docs: Add peformance tools getting started docs in new tools/performance subtree.
Bug: 231376
Change-Id: I8126a0c71f3e87bbb2e3823aacbe0ab20c59d5a9
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diff --git a/docs/html/jd_collections.js b/docs/html/jd_collections.js
index e2d0eb9..acbd138 100644
--- a/docs/html/jd_collections.js
+++ b/docs/html/jd_collections.js
@@ -1281,5 +1281,38 @@
"training/enterprise/work-policy-ctrl.html",
"samples/BasicManagedProfile/index.html"
]
+ },
+ "tools/performance/rendering": {
+ "title": "",
+ "resources": [
+ "tools/performance/debug-gpu-overdraw/index.html",
+ "tools/performance/profile-gpu-rendering/index.html",
+ "tools/performance/hierarchy-viewer/setup.html",
+ "tools/performance/hierarchy-viewer/index.html",
+ "tools/performance/hierarchy-viewer/profiling.html"
+ ]
+ },
+ "tools/performance/memory": {
+ "title": "",
+ "resources": [
+ "tools/performance/memory-monitor/index.html",
+ "tools/performance/heap-viewer/index.html",
+ "tools/performance/allocation-tracker/index.html",
+ "tools/performance/comparison.html"
+ ]
+ },
+ "tools/performance/cpu": {
+ "title": "",
+ "resources": [
+ "tools/performance/traceview/index.html",
+ "tools/performance/systrace/index.html"
+ ]
+ },
+ "tools/performance/battery": {
+ "title": "",
+ "resources": [
+ "tools/performance/batterystats-battery-historian/index.html",
+ "tools/performance/batterystats-battery-historian/charts.html"
+ ]
}
}
diff --git a/docs/html/tools/performance/allocation-tracker/index.jd b/docs/html/tools/performance/allocation-tracker/index.jd
new file mode 100644
index 0000000..e71b584
--- /dev/null
+++ b/docs/html/tools/performance/allocation-tracker/index.jd
@@ -0,0 +1,148 @@
+page.title=Allocation Tracker Walkthrough
+meta.tags="android, performance, profiling, tools, memoryleaks, memoryheap"
+page.tags="android", "performance", "profiling", "tools", "memoryleaks", "memoryheap"
+page.metaDescription=Record you app's memory allocations with their call stack to identify code that allocates and frees objects unnecessarily.
+page.image=tools/performance/thumbnails/tools_allocation_tracker.png
+page.article=true
+
+
+@jd:body
+
+<style>
+ .no-bullet {
+ list-style-type: none;
+ }
+ .padded {
+ padding-left: 10px;
+ }
+</style>
+
+
+<div id="tb" style="margin-left: 7px; margin-bottom: 5px;">
+
+<h2>In this document</h2>
+<ul>
+ <li><a href="#WhatYouNeed">Prerequisites</a></li>
+ <li><a href="#WorkingWithAllocationTracker">Working with Allocation Tracker</a></li>
+</ul>
+
+<h2>You should also read</h2>
+<ul>
+ <li><a href="{@docRoot}tools/performance/heap-viewer/index.html">
+ Heap Viewer Walkthrough</a></li>
+ <li><a href="{@docRoot}tools/performance/memory-monitor/index.html">
+ Memory Monitor Walkthrough</a></li>
+ <li><a href="{@docRoot}tools/performance/comparison.html">
+ Comparison: Memory Monitor, Heap Viewer, Allocation Tracker</a>
+ <li><a href="{@docRoot}tools/performance/traceview/index.html">
+ Traceview Walkthrough</a></li>
+</ul>
+
+</div>
+
+
+ <p>This walkthrough shows the basic usage and workflow for the Allocation Tracker tool in Android
+ Studio. Allocation Tracker records an app's memory allocations and lists all
+ allocated objects for the profiling cycle with their call stack, size, and allocating code.</p>
+
+ <p>What it's good for:</p>
+
+ <ul>
+ <li>Identifying where many similar object types, from roughly the same call stack, are
+ allocated and deallocated over a very short period of time.</li>
+
+ <li>Finding the places in your code that may contribute to inefficient memory use.</li>
+ </ul>
+
+ <p>Before using Allocation Tracker, profile your code with the
+ <a href="{@docRoot}tools/performance/memory-monitor/index.html">Memory
+ Monitor Tool</a>. If you see many garbage collection events in a short amount of time, use
+ <a href="{@docRoot}tools/performance/heap-viewer/index.html">Heap
+ Viewer</a> to identify candidate object types, and Allocation Tracker to determine where this is
+ happening in your code.</p>
+
+ <h2 id="WhatYouNeed">Prerequisites</h2>
+
+ <ul>
+ <li>A mobile device with <a href=
+ "http://developer.android.com/tools/device.html#developer-device-options">Developer Options</a>
+ enabled.</li>
+
+ <li>Application code. Use your own code, or the <a href=
+ "https://github.com/udacity/Sunshine-Version-2">Sunshine</a> sample app from the <a href=
+ "https://www.udacity.com/course/ud853">Android Fundamentals Udacity course</a>.</li>
+ </ul>
+
+ <h2 id="WorkingWithAllocationTracker">Working with Allocation Tracker</h2>
+
+ <p>Allocation Tracker records each memory allocation that your app performs during the profiling
+ cycle. You tell Allocation Tracker to start recording and it logs allocations
+ until you tell it to stop.</p>
+
+<hr>
+<ul class="no-bullet">
+<!-- this also hides bullet, by default outside box -->
+ <li><div style="overflow:hidden">
+ <ol class="padded">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/allocation-tracker/gettingstarted_image01.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 1. </strong>Steps for starting Allocation Tracker.
+ </p>
+ </div>
+
+ <li>Connect your mobile device to your computer.</li>
+
+ <li>Open your application in Android Studio, build the source, and run it on your device.</li>
+
+ <li>Click the <b>Android</b> button at the bottom of your Android Studio window.</li>
+
+ <li>Click the RECORD button
+ <img src="{@docRoot}images/tools/performance/allocation-tracker/gettingstarted_image02.png">
+ (Start Allocation Tracking tooltip).</li>
+
+ <li>Interact with your application.</li>
+
+ <li>Click the (same) STOP button (Stop Allocation Tracking tooltip).</li>
+ </ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="7">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/allocation-tracker/gettingstarted_image03.png"
+ alt=""
+ width="440px" />
+ <p class="img-caption">
+ <strong>Figure 2. </strong>Example of Allocation Tracker output.
+ </p>
+ </div>
+
+ <li>After a few seconds, a pane with your recorded data opens.
+
+ <p>Note that allocations are logged on
+ the device, and the data file is transferred to the host computer, parsed for information, and
+ displayed.</p></li>
+
+ <li>The pane populates with a table.
+
+ <ul>
+ <li>Each row represents a memory allocation event.</li>
+
+ <li>Each column represents information about the allocation, such as the object type,
+ the thread, and its size. </li>
+
+ <li>The columns are movable, resizable, and sortable.</li>
+ </ul>
+
+ <p>Use the Filter to show only allocations from your app.</li>
+
+ <li>Click on an object to see its full stack trace.</li>
+ </ol>
+</div></li>
+</ul>
diff --git a/docs/html/tools/performance/batterystats-battery-historian/charts.jd b/docs/html/tools/performance/batterystats-battery-historian/charts.jd
new file mode 100644
index 0000000..cbe9d85
--- /dev/null
+++ b/docs/html/tools/performance/batterystats-battery-historian/charts.jd
@@ -0,0 +1,124 @@
+page.title=Battery Historian Charts
+meta.tags="android, performance, profiling, tools, battery, historian, batterydrain
+page.tags="android", performance", "profiling", "tools", "battery", "historian" "batterydrain"
+page.metaDescription=Examine and interpret the collected battery usage data in your browser.
+page.image=tools/performance/thumbnails/tools_battery_historian.png
+page.article=true
+
+@jd:body
+
+<div id="tb" style="margin-left: 7px; margin-bottom: 5px;">
+
+<h2>In this document</h2>
+<ul>
+ <li><a href="#BatteryHistorianCharts">Battery Historian Charts</a></li>
+ <li><a href="#FilteringBatterystats">Filtering batterystats output</a></li>
+</ul>
+
+<h2>You should also read</h2>
+<ul>
+ <li><a href="{@docRoot}tools/performance/batterystats-battery-historian/index.html">
+ Batterystats & Battery Historian Walkthrough</a></li>
+ <li><a href="{@docRoot}tools/performance/systrace/index.html">
+ Systrace Walkthrough</a></li>
+</ul>
+
+</div>
+
+
+ <p id="BatteryHistorianCharts">
+ The Battery Historian chart graphs power-relevant events over time.</p>
+
+ <p>Each row shows a colored bar segment when a system component is active
+ and thus drawing current from the battery. The chart does <i>not</i> show <i>how much</i> battery was used by the
+ component, only that the app was active. Charts are organized by category.</p>
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/batterystats-battery-historian/gettingstarted_image02.png"
+ alt=""
+ height="" />
+ <p class="img-caption">
+ <strong>Figure 1. </strong>Example of Battery Historian output.
+ </p>
+ </div>
+
+ <h3>Battery usage categories</h3>
+
+ <ul>
+ <li><b>battery_level</b>: When the battery level was recorded and logged.
+ Reported in percent, where 093 is 93%. Provides an overall measure of how fast the battery
+ is draining.</li>
+
+ <li><b>top</b>: The application running at the top; usually, the application that is visible to
+ the user. If you want to measure battery drain while your app is active, make sure
+ it's the top app. If you want to measure battery drain while your app is in
+ the background, make sure it's <i>not</i> the top app.</li>
+
+ <li><b>wifi_running</b>: Shows that the Wi-Fi network connection was active.</li>
+
+ <li><b>screen</b>: Screen is turned on.</li>
+
+ <li><b>phone_in_call</b>: Recorded when the phone is in a call.</li>
+
+ <li><b>wake_lock</b>: App wakes up, grabs a lock, does small work, then goes back to sleep.
+ This is one of the most important pieces of information. Waking up the phone is expensive, so
+ if you see lots of short bars here, that might be a problem.</li>
+
+ <li><b>running</b>: Shows when the CPU is awake. Check whether it is awake and asleep
+ when you expect it to be.</li>
+
+ <li><b>wake_reason</b>: The last thing that caused the kernel to wake up. If
+ it's your app, determine whether it was necessary.</li>
+
+ <li><b>mobile_radio</b>: Shows when the radio was on. Starting the radio is battery expensive.
+ Many narrow bars close to each other can indicate opportunities for
+ batching and other optimizations.</li>
+
+ <li><b>gps</b>: Indicates when the GPS was on. Make sure this is what you expect.</li>
+
+ <li><b>sync:</b> Shows when an app was syncing with a backend. The sync bar also shows which
+ app did the syncing. For users, this can show apps where they might turn syncing off to save
+ battery. Developers should sync as little as possible and only as often as necessary.</li>
+ </ul>
+
+
+ <p class="note"><strong>Note:</strong>
+ Not every chart will show every category.</p>
+
+ <h2 id="FilteringBatterystats">Filtering batterystats output</h2>
+
+ <p>You can gather additional information from the <code>batterystats.txt</code> file
+ where you saved the output from the batterystats command.</p>
+
+ <div class="figure" style="">
+<img src="{@docRoot}images/tools/performance/batterystats-battery-historian/gettingstarted_image03.png"
+ alt=""
+ width="340px" />
+ <p class="img-caption">
+ <strong>Figure 2.</strong>Example of filtered batterystats output.
+ </p>
+ </div>
+
+ <p>Open the file in a text editor and search for:</p>
+
+ <ol>
+ <li><b><code>Battery History</code></b>: A time series of power-relevant events, such as
+ screen, Wi-Fi, and app launch. These are also visible through Battery Historian.</li>
+
+ <li><b><code>Per-PID Stats</code></b>: How long each process ran.</li>
+
+ <li><b><code>Statistics since last charge</code></b>: System-wide statistics, such as
+ cell signal levels and screen brightness. Provides an overall picture of what's happening
+ with the device. This information is especially useful
+ to make sure no external events are affecting your experiment.</li>
+
+ <li><b><code>Estimated power use (mAh)</code></b> by UID and peripheral: This is currently an
+ extremely rough estimate and should not be considered experiment data.</li>
+
+ <li><b><code>Per-app mobile ms per packet</code></b>: Radio-awake-time divided by packets sent.
+ An efficient app will transfer all its traffic in batches, so the lower this number the
+ better.</li>
+
+ <li><b><code>All partial wake locks</code></b>: All app-held wakelocks, by aggregate
+ duration and count.</li>
+ </ol>
diff --git a/docs/html/tools/performance/batterystats-battery-historian/index.jd b/docs/html/tools/performance/batterystats-battery-historian/index.jd
new file mode 100644
index 0000000..2072df9
--- /dev/null
+++ b/docs/html/tools/performance/batterystats-battery-historian/index.jd
@@ -0,0 +1,129 @@
+page.title=Batterystats & Battery Historian Walkthrough
+meta.tags="android, performance, profiling, tools, battery, batterystats, historian, batterydrain
+page.tags="android", "performance", "profiling", "tools", "battery", "batterystats", "historian", "batterydrain"
+page.metaDescription=Collect battery usage data from your device and display it graphically in your browser.
+page.image=tools/performance/thumbnails/tools_battery_historian.png
+page.article=true
+
+
+@jd:body
+
+<div id="tb" style="margin-left: 7px; margin-bottom: 5px;">
+
+<h2>You should also read</h2>
+<ul>
+ <li><a href="{@docRoot}tools/performance/batterystats-battery-historian/charts.html">
+ Battery Historian Charts</a></li>
+ <li><a href="{@docRoot}tools/performance/systrace/index.html">
+ Systrace Walkthrough</a></li>
+</ul>
+
+</div>
+
+ <p>This walkthrough shows the basic usage and workflow for the Batterystats tool and the Battery
+ Historian script.</p>
+
+ <p>Batterystats collects battery data from your device, and Battery Historian converts that data
+ into an HTML visualization that you can view in your Browser. Batterystats is part of the Android
+ framework, and Battery Historian is open-sourced and available on GitHub at <a href=
+ "https://github.com/google/battery-historian">https://github.com/google/battery-historian</a>.</p>
+
+ <p>What it's good for:</p>
+
+ <ul>
+ <li>Showing you where and how processes are drawing current from the battery.</li>
+
+ <li>Identifying tasks in your app that could be deferred or even removed to improve battery
+ life.</li>
+ </ul>
+
+ <h2>Prerequisites</h2>
+
+ <ul>
+ <li>A mobile device with <a href=
+ "http://developer.android.com/tools/device.html#developer-device-options">Developer Options</a>
+ enabled running Android 5.0 or higher.</li>
+ </ul>
+
+ <h2>Working with Batterystats & Battery Historian</h2>
+
+ <div class="sidebox-wrapper" style="width:400px;">
+ <div class="sidebox" style="width:350px;">
+ <h2>Summary</h2>
+ <code>
+ <p><b>https://github.com/google/battery-historian</b></p>
+ <p>> adb kill-server</p>
+ <p>> adb devices</p>
+ <p>> adb shell dumpsys batterystats --reset</p>
+ <p><disconnect and play with app>...<reconnect></p>
+ <p>> adb devices</p>
+ <p>>adb shell dumpsys batterystats > batterystats.txt</p>
+ <p>> python historian.py batterystats.txt > batterystats.html</p>
+ </code>
+ </div>
+ </div>
+
+ <ol>
+
+ <li>Download the open-source Battery Historion Python script from GitHub (<a href=
+ "https://github.com/google/battery-historian">https://github.com/google/battery-historian</a>).
+ </li>
+
+ <li>Unzip the file to extract the Battery Historian folder. Inside the folder,
+ find the <code>historian.py</code> file
+ and move it to the Desktop or another <em>writable</em> directory.</li>
+
+ <li>Connect your mobile device to your computer.</li>
+
+ <li>On your computer, open a Terminal window.</li>
+
+ <li>Change to the directory where you've saved <code>historian.py</code>,
+ <br>for example:
+ <code>cd ~/Desktop</code></li>
+
+ <li>Shut down your running adb server.
+ <br><code>> adb kill-server</code></li>
+
+ <li>Restart adb and check for connected devices.
+ <br><code>> adb devices</code>
+ <br><img src="{@docRoot}images/tools/performance/batterystats-battery-historian/gettingstarted_image01.png">
+ <br>If you don't see any devices, make sure your phone is connected, and USB Debugging
+ is turned on, and then kill and restart adb.</li>
+
+ <li>Reset battery data gathering.
+ <br><code>> adb shell dumpsys batterystats --reset</code>
+ <p>Resetting erases old battery collection data; otherewise, the output will be huge.</p>
+ </li>
+
+ <li>Disconnect your device from your computer so that you are only drawing current from the
+ device's battery.</li>
+
+ <li>Play with your app for a short time.</li>
+
+ <li>Reconnect your phone.</li>
+
+ <li>Make sure your phone is recognized: <code>> adb devices</code></li>
+
+ <li>Dump all battery data. This can take a while:
+ <br><code>> adb shell dumpsys batterystats > batterystats.txt</code></li>
+
+ <li>Create a HTML version of the data dump for Battery Historian:
+ <br><code>> python historian.py batterystats.txt > batterystats.html</code></li>
+
+ <li>Open the <code>batterystats.htm</code> file in your browser.</li>
+
+ <li>Continue with <a href="{@docRoot}tools/performance/batterystats-battery-historian/charts.html">
+ Battery Historian Charts</a>.
+ </li>
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/batterystats-battery-historian/gettingstarted_image02.png"
+ alt=""
+ <p class="img-caption">
+ <strong>Figure 1. </strong>Battery Historian output.
+ </p>
+ </div>
+ </ol>
+
+
+
diff --git a/docs/html/tools/performance/comparison.jd b/docs/html/tools/performance/comparison.jd
new file mode 100644
index 0000000..cf4b7120
--- /dev/null
+++ b/docs/html/tools/performance/comparison.jd
@@ -0,0 +1,133 @@
+page.title=Memory Profilers
+meta.tags="android, performance, profiling, tools, memory, memoryleaks, garbagecollection"
+page.tags="android", "performance", "profiling", "tools", "memory", "memoryleaks", "garbagecollection"
+page.metaDescription=Heap Viewer, Memory Monitor, and Allocation Tracker are complementary tools that visualize the memory your app uses.
+page.image=tools/performance/thumbnails/tools_memory_monitor.png
+page.article=true
+
+@jd:body
+
+<div id="tb" style="margin-left: 7px; margin-bottom: 5px;">
+
+<h2>In this document</h2>
+<ul>
+ <li><a href="#MemoryMonitor">Memory Monitor</a></li>
+ <li><a href="#HeapViewer">Heap Viewer</a></li>
+ <li><a href="#AllocationTracker">Allocation Tracker</a></li>
+
+</ul>
+
+<h2>You should also read</h2>
+<ul>
+ <li><a href="{@docRoot}tools/performance/memory-monitor/index.html">
+ Memory Monitor Walkthrough</a></li>
+ <li><a href="{@docRoot}tools/performance/heap-viewer/index.html">
+ Heap Viewer Walkthrough</a></li>
+ <li><a href="{@docRoot}tools/performance/allocation-tracker/index.html">
+ Allocation Tracker Walkthrough</a></li>
+</ul>
+
+</div>
+
+ <p>Heap Viewer, Memory Monitor, and Allocation Tracker are complementary tools that visualize the
+ memory your app uses.</p>
+
+ <ol>
+ <li>Use the
+ <a href="{@docRoot}tools/performance/memory-monitor/index.html">
+ Memory Monitor Tool</a> to find out whether undesirable garbage collection (GC) event patterns might
+ be causing your performance problems.</li>
+
+ <li>Run
+ <a href="{@docRoot}tools/performance/heap-viewer/index.html">
+ Heap Viewer</a> to identify object types that get or stay allocated
+ unexpectedely or unecessarily.</li>
+
+ <li>Use
+ <a href="{@docRoot}tools/performance/allocation-tracker/index.html">
+ Allocation Tracker</a> to identify where in your code the problem might be.</li>
+ </ol>
+
+ <h2 id="MemoryMonitor">Memory Monitor</h2>
+
+<div>
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/compare_MemoryMonitor.png"
+ alt=""
+ height="" />
+ <p class="img-caption">
+ <strong>Figure 1. </strong>Memory Monitor.
+ </p>
+ </div>
+
+ <ul>
+ <li>Shows available and used memory as they both change over time <i>for your app</i> in a
+ graph, with dips indicating Garbage Collection (GC) events.</li>
+
+ <li>Provides a quick way to test whether app slowness might be related
+ to excessive GC events.</li>
+
+ <li>Provides a quick way to see whether app crashes might be related
+ to running out of memory.</li>
+
+ <li>Runs live on your application and updates about once a second.</li>
+
+ <li>Helps quickly identify the potential of memory leaks.</li>
+
+ <li>Helps identify GC patterns for your application and determine whether
+ they are healthy and what you expect.</li>
+
+ <li>Is easy to use, and it is easy to interpret what you see.</li>
+
+ <li>However, Memory Monitor does not tell you which objects are the cause
+ of your problems, or where in your code it might be.</li>
+ </ul>
+
+ <h2 id="HeapViewer">Heap Viewer</h2>
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/compare_HeapViewer.png"
+ alt=""
+ height="" />
+ <p class="img-caption">
+ <strong>Figure 2. </strong>Heap Viewer.
+ </p>
+ </div>
+
+ <ul>
+ <li>Shows snapshots of a number of objects allocated by type.</li>
+
+ <li>Samples data every time a garbage collection event occurs
+ naturally or triggered by you.</li>
+
+ <li>Helps identify which object types might be involved in memory leaks.</li>
+
+ <li>However, you have to look for changes over time yourself by tracking what's
+ happening in the graph.</li>
+ <br><br><br><br>
+ </ul>
+
+ <h2 id="AllocationTracker">Allocation Tracker</h2>
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/compare_AllocationTracker.png"
+ alt=""ge
+ height="" />
+ <p class="img-caption">
+ <strong>Figure 3. </strong>Allocation Tracker.
+ </p>
+ </div>
+
+ <ul>
+ <li>Shows when and where your code allocates object types, their size, allocating thread, and
+ stack traces.</li>
+
+ <li>Helps recognize memory churn through recurring allocation/deallocation patterns.</li>
+
+ <li>Can be used in combination with Heap Viewer to track down memory leaks. For example, if you
+ see a bitmap object resident on the heap, you can find its allocation location with Allocation
+ Tracker.</li>
+
+ <li>However, it takes time and experience to learn to interpret the output from this tool.</li>
+
+ </ul>
diff --git a/docs/html/tools/performance/debug-gpu-overdraw/index.jd b/docs/html/tools/performance/debug-gpu-overdraw/index.jd
new file mode 100644
index 0000000..e6b85fd
--- /dev/null
+++ b/docs/html/tools/performance/debug-gpu-overdraw/index.jd
@@ -0,0 +1,156 @@
+page.title=Debug GPU Overdraw Walkthrough
+meta.tags="android, performance, profiling, tools, rendering, overdraw"
+page.tags="android", "performance", "profiling", "tools", "rendering", "overdraw"
+page.metaDescription=Use color-coding to show how many times each pixel is redrawn on the screen to reduce rendering overhead.
+page.image=tools/performance/thumbnails/tools_debug_gpu_overdraw.png
+page.article=true
+
+
+@jd:body
+
+<style>
+ .no-bullet {
+ list-style-type: none;
+ }
+ .padded {
+ padding-left: 10px;
+ }
+</style>
+
+<div id="tb" style="margin-left: 7px; margin-bottom: 5px;">
+
+<h2>In this document</h2>
+<ul>
+ <li><a href="#WhatYouNeed">Prerequisites</a></li>
+ <li><a href="#VisualizingOverdraw">Visualizing Overdraw</a></li>
+</ul>
+
+<h2>You should also read</h2>
+<ul>
+ <li><a href="{@docRoot}tools/performance/profile-gpu-rendering/index.html">
+ Profile GPU Rendering Walkthrough</a></li>
+ <li><a href="{@docRoot}tools/performance/hierarchy-viewer/index.html">
+ Hierarchy Viewer Walkthrough</a></li>
+</ul>
+
+</div>
+
+ <p>This walkthrough shows how to visualize overdraw on your mobile device by color-coding
+ interface elements based on how often they are drawn underneath.</p>
+
+ <p>What it's good for:</p>
+
+ <ul>
+ <li>Showing where an app might be doing more rendering work than necessary.</li>
+
+ <li>Helping you see where you might be able to reduce rendering overhead.</li>
+ </ul>
+
+ <h2 id="WhatYouNeed">Prerequisites</h2>
+
+ <ul>
+ <li>A mobile device with <a href=
+ "http://developer.android.com/tools/device.html#developer-device-options">Developer Options</a>
+ enabled.</li>
+ </ul>
+
+
+ <h2 id="VisualizingOverdraw">Visualizing Overdraw on your Mobile Device</h2>
+
+ <ul class="no-bullet">
+ <!-- this also hides bullet, by default outside box -->
+ <li><div style="overflow:hidden">
+ <ol class="padded">
+
+ <div class="figure" style="">
+ <img
+ src="{@docRoot}images/tools/performance/debug-gpu-overdraw/gettingstarted_image01.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 1. </strong>Steps for turning on Debug GPU Overdraw.
+ </p>
+ </div>
+
+ <li>On your mobile device, go to <b>Settings</b> and tap <b>Developer Options</b>.</li>
+
+ <li>In the <em>Hardware accelerated rendering</em> section,
+ select <b>Debug GPU Overdraw</b>.</li>
+
+ <li>In the <b>Debug GPU overdraw</b> popup, select <b>Show overdraw areas</b>.</li>
+ </ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="5">
+
+ <div class="figure" style="padding-right:100px">
+ <img
+ src="{@docRoot}images/tools/performance/debug-gpu-overdraw/gettingstarted_image02.png"
+ alt=""
+ width="180px" />
+ <p class="img-caption">
+ <strong>Figure 2. </strong>Example of<br>Debug GPU Overdraw output.
+ </p>
+ </div>
+
+ <li>Don't panic as your screen turns into a delirium of colors.
+ The coloring is provided to help you diagnose your app's display behavior.</li>
+
+ </ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="6">
+
+ <div class="figure" style="">
+ <img
+ src="{@docRoot}images/tools/performance/debug-gpu-overdraw/gettingstarted_image03.png"
+ alt=""
+ width="300px" />
+ <p class="img-caption">
+ <strong>Figure 3. </strong>Color key for Debug GPU Overdraw output.
+ </p>
+ </div>
+
+ <br><br>
+ <li>The colors are hinting at the amount of overdraw on your screen for each pixel, as
+ follows:
+
+ <ul>
+ <li><b>True color:</b> No overdraw</li>
+ <li><b>Blue:</b> Overdrawn once</li>
+ <li><b>Green:</b> Overdrawn twice</li>
+ <li><b>Pink:</b> Overdrawn three times</li>
+ <li><b>Red:</b> Overdrawn four or more times</li>
+ </ul>
+ </li>
+
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="7">
+
+ <div class="figure" style="">
+ <img
+ src="{@docRoot}images/tools/performance/debug-gpu-overdraw/gettingstarted_image04.png"
+ alt=""
+ width="300px" />
+ <p class="img-caption">
+ <strong>Figure 4. </strong>Examples of undesirable and desirable
+ <br>Debug GPU Overdraw output.
+ </p>
+ </div>
+
+ <br><br><br>
+ <li>Some overdraw is unavoidable. As you are tuning your app's
+ user interface, the goal is to arrive at a visualization that shows mostly true
+ colors and 1X overdraw in blue.</li>
+
+ </ol>
+</div></li>
+</ul>
diff --git a/docs/html/tools/performance/heap-viewer/index.jd b/docs/html/tools/performance/heap-viewer/index.jd
new file mode 100644
index 0000000..9ca0c47c
--- /dev/null
+++ b/docs/html/tools/performance/heap-viewer/index.jd
@@ -0,0 +1,177 @@
+page.title=Heap Viewer Walkthrough
+meta.tags="android, performance, profiling, tools, memory, memoryleaks, memoryheap"
+page.tags="android", "performance", "profiling", "tools", "memory", "memoryleaks", "memoryheap"
+page.metaDescription=Report in real-time how many objects of what types and sizes your application is allocating and find memory leaks.
+page.image=tools/performance/thumbnails/tools_heap_viewer.png
+page.article=true
+
+@jd:body
+
+<style>
+ .no-bullet {
+ list-style-type: none;
+ }
+ .padded {
+ padding-left: 10px;
+ }
+</style>
+
+<div id="tb" style="margin-left: 7px; margin-bottom: 5px;">
+
+<h2>In this document</h2>
+<ul>
+ <li><a href="#WhatYouNeed">Prerequisites</a></li>
+ <li><a href="#WorkingWithHeapViewer">Working with Heap Viewer</a></li>
+</ul>
+
+<h2>You should also read</h2>
+<ul>
+ <li><a href="{@docRoot}tools/performance/memory-monitor/index.html">
+ Memory Monitor Walkthrough</a></li>
+ <li><a href="{@docRoot}tools/performance/allocation-tracker/index.html">
+ Allocation Tracker Walkthrough</a></li>
+ <li><a href="{@docRoot}tools/performance/comparison.html">
+ Comparison: Memory Monitor, Heap Viewer, Allocation Tracker</a>
+ <li><a href="{@docRoot}tools/performance/traceview/index.html">
+ Traceview Walkthrough</a></li>
+</ul>
+
+</div>
+
+
+ <p>This walkthrough shows the basic usage and workflow for the Heap Viewer tool. Heap Viewer
+ reports in real-time what <i>types</i> of objects your application has allocated, how many, and
+ their sizes on the heap.</p>
+
+ <p>What it's good for:</p>
+
+ <ul>
+ <li>Getting a sense of how your app allocates and frees memory.</li>
+
+ <li>Identifying memory leaks.</li>
+ </ul>
+
+ <h2 id="WhatYouNeed">Prerequisites</h2>
+
+ <ul>
+ <li>A mobile device running Android 5.0 or higher with <a href=
+ "http://developer.android.com/tools/device.html#developer-device-options">Developer Options</a>
+ enabled.</li>
+
+ <li>Application code. Use your own code, or the <a href=
+ "https://github.com/udacity/Sunshine-Version-2">Sunshine</a> sample app from the <a href=
+ "https://www.udacity.com/course/ud853">Android Fundamentals Udacity course</a>.</li>
+ </ul>
+
+ <h2 id="WorkingWithHeapViewer">Working with Heap Viewer</h2>
+
+ <ul class="no-bullet">
+ <!-- this also hides bullet, by default outside box -->
+ <li><div style="overflow:hidden">
+ <ol class="padded">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/heap-viewer/gettingstarted_image01.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 1. </strong>Starting Android Device Monitor.
+ </p>
+ </div>
+
+ <li>Connect your mobile device to your computer.</li>
+
+ <li>Open your application in Android Studio, build the source, and run it on your device.</li>
+
+ <li>Start the Android Device Monitor from Android Studio: <b>Tools -> Android -> Android
+ Device</b> <b>Monitor</b>.
+
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="4">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/heap-viewer/gettingstarted_image02.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 2. </strong>Steps for Using Heap Viewer.
+ </p>
+ </div>
+
+ <li>Make sure your device and application are showing in the <b>Devices</b> tab.</li>
+
+ <li>Click the <b>DDMS</b> button, because the Heap Viewer is one of the DDMS tools.</li>
+
+ <li>Click the <b>Heap</b> tab, which is where your data will appear.</li>
+
+ <li>In the <b>Devices</b> tab, select the app you want to monitor.</li>
+
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="8">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/heap-viewer/gettingstarted_image03.png"
+ alt=""
+ width="300px" />
+ <p class="img-caption">
+ <strong>Figure 3. </strong>Update Heap button.
+ </p>
+ </div>
+
+ <li>To start monitoring, click the Update Heap button, which looks like a green can.</li>
+
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="9">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/heap-viewer/gettingstarted_image04.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 4. </strong>Triggering GC (Garbage Collection).
+ </p>
+ </div>
+
+ <li>Note the <em>Heap updates will happen
+ after every GC for this client.</em> message.</li>
+
+ <li>Press the <strong>Cause CG</strong> button to
+ trigger a garbage collection event.
+ </li>
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="11">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/heap-viewer/gettingstarted_image05.png"
+ alt=""
+ width="480px" />
+ <p class="img-caption">
+ <strong>Figure 5. </strong>Example Heap Viewer output.
+ </p>
+ </div>
+
+ <li>Click a data type to see detailed information on its current allocations on the
+ heap.</li>
+
+ </ol>
+</div></li>
+
+ <p class="note"><b>Note:</b> To visualize allocation changes over time, combine
+ several snapshots of the bar graph into an animated gif or video.</p>
+ </ul>
diff --git a/docs/html/tools/performance/hierarchy-viewer/index.jd b/docs/html/tools/performance/hierarchy-viewer/index.jd
new file mode 100644
index 0000000..ebf23e5
--- /dev/null
+++ b/docs/html/tools/performance/hierarchy-viewer/index.jd
@@ -0,0 +1,330 @@
+page.title=Hierarchy Viewer Walkthrough
+meta.tags="android, performance, profiling, tools, rendering, hierarchyviewer"
+page.tags="android", "performance", "profiling", "tools", "rendering", "hierarchyviewer"
+page.metaDescription=Visualize your app's view hierarchy to help you simplify your layouts.
+page.image=tools/performance/thumbnails/tools_hierarchy_viewer.png
+page.article=true
+
+@jd:body
+
+<style>
+ .no-bullet {
+ list-style-type: none;
+ }
+ .padded {
+ padding-left: 10px;
+ }
+</style>
+
+<div id="tb" style="margin-left: 7px; margin-bottom: 5px;">
+
+<h2>In this document</h2>
+<ul>
+ <li><a href="#WhatYouNeed">Prerequisites</a></li>
+ <li><a href="#WorkingWithHierarchyViewer">Working with Hierarchy Viewer</a></li>
+</ul>
+
+<h2>You should also read</h2>
+<ul>
+ <li><a href="{@docRoot}tools/performance/hierarchy-viewer/setup.html">
+ Device Setup for Hierarchy Viewer</a></li>
+ <li><a href="{@docRoot}tools/performance/hierarchy-viewer/profiling.html">
+ Profiling with Hierarchy Viewer</a></li>
+ <li><a href=
+ "http://developer.android.com/tools/debugging/debugging-ui.html#viewhierarchy">Hierarchy Viewer
+ </a></li>
+ <li><a href="/guide/topics/ui/overview.html#Layout">View Hierarchies</a></li>
+ <li><a href="{@docRoot}tools/performance/importing-legacy-apps.html">
+ Importing Legacy Apps into Android Studio<a></li>
+ <li><a href="{@docRoot}tools/device.html">Using Hardware Devices</a></li>
+</ul>
+
+</div>
+
+ <p>This walkthrough shows the basic usage and workflow for the Hierarchy Viewer tool.</p>
+
+ <p>The Hierarchy Viewer tool visualizes your app's <a href=
+ "http://developer.android.com/guide/topics/ui/overview.html#Layout">view hierarchy</a> and
+ profiles the relative rendering speed for each view.
+
+ <p>What it's good for:</p>
+
+ <ul>
+ <li>Simplifying your view hierarchy to reduce overdraw, and make it easier to manage.</li>
+
+ <li>Finding potential rendering performance bottlenecks related to the structure and shape of your
+ view hierarchy.</li>
+ </ul>
+
+ <h2 id="WhatYouNeed">Prerequisites</h2>
+
+ <ul>
+ <li>A mobile device set up to work with Hierarchy Viewer:</li>
+
+ <li style="list-style: none; display: inline">
+ <ol>
+ <li>You must have <a href=
+ "http://developer.android.com/tools/device.html#developer-device-options">Developer
+ Options</a> enabled on your mobile device. You must use a physical device to get
+ accurate measurements.</li>
+
+ <li>Set an {@code ANDROID_HVPROTO} environment variable on the desktop machine
+ that is connected to your device. For more information, see
+ <a href="{@docRoot}tools/performance/hierarchy-viewer/setup.html">Device Setup for Hierarchy Viewer</a>.</li>
+ </ol>
+ </li>
+
+ <li>Debuggable app code with a view hierarchy. Use your own code, or the code for the <a href=
+ "https://github.com/udacity/Sunshine-Version-2">Sunshine</a> sample app from the <a href=
+ "https://www.udacity.com/course/ud853">Android Fundamentals Udacity course</a>.</li>
+ </ul>
+
+ <h2 id="WorkingWithHierarchyViewer">Working with Hierarchy Viewer</h2>
+
+<ul class="no-bullet">
+<!-- this also hides bullet, by default outside box -->
+ <li><div style="overflow:hidden">
+ <ol class="padded">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image001.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 1. </strong>Starting Android Device Monitor.
+ </p>
+ </div>
+
+ <li>Connect your mobile device to your computer.</li>
+
+ <li>Open your application in Android Studio, build the source, and run it on your device.</li>
+
+ <li>From Android Studio, start the Android Device Monitor: <b>Tools > Android >
+ Android Device Monitor</b>.</li>
+
+ <li>Allow <b>USB Debugging</b> on your phone (if asked).</li>
+
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="6">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image005.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 2. </strong>Android Device Monitor.
+ </p>
+ </div>
+
+ <li>Figure 2 illustrates what is initially shown in the Device Monitor tool. This varies
+ depending on your setup.
+ <p>Make sure your device
+ and the package for your application are showing in the Devices (DDMS mode) or Windows
+ (Hierarchy Viewer mode) tab. You can choose <b>Window > Reset Perspective</b> to get
+ back to the default arrangement.</p>
+ <p>If the app does not appear, make sure you
+ followed the <a href="{@docRoot}tools/performance/hierarchy-viewer/setup.html"> device
+ setup instructions</a>, then start over at step 1.</p></li>
+
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="7">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image002.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 3. </strong>Changing Perspective to Hierarchy Viewer.
+ </p>
+ </div>
+
+ <li>In Android Device Monitor (ADM), in the menu bar, choose <b>Window > Open
+ Perspective</b>, and in the popup click <b>Hierarchy View</b>.<br>
+
+ <p>OR</p>
+ <p> Click the <b>Hierarchy View</b> button if it's already visible.<br>
+ <img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image003.png">
+ </p></li>
+
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="9">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image006.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 4. </strong>Hierarchy Viewer layout.
+ </p>
+ </div>
+
+ <li>If not already open, the Hierarchy View panes open.<br>
+ The example screen in Figure 4 shows an example of these panes.</li>
+
+ </ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="10">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image004.png"
+ alt=""
+ width="240px" />
+ <p class="img-caption">
+ <strong>Figure 5. </strong>Resetting the Perspective.
+ </p>
+ </div>
+
+ <li>If you see a different window arrangement, in Android Device Manager, use
+ <b>Window > Reset Perspective</b> to return to the default layout for this tutorial.
+
+ </ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="11">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image007.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 6. </strong>Populated Hierarchy Viewer.
+ </p>
+ </div>
+
+ <li>Double-click your application in the Windows tab. This populates the panes with the
+ view hierarchy of your application.
+ This display is a static representation of the complete view hierarchy defined for the
+ app.</li>
+
+ <li>You can adjust the sizes of the panes and ADM will preserve your
+ arrangement in future sessions.</li>
+
+ </ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="13">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image008.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 7. </strong>Hierarchy Viewer panes.
+ </p>
+ </div>
+
+ <li>If necessary, click the <b>Layout View</b> tab to hide the Console and show a wireframe of
+ your layout. The outline of the currently selected view is red. Click an outline to select
+ it.</li>
+
+ <li>The rest of the panes:
+
+ <ul>
+ <li>The <b>Tree Overview</b> in the upper right gives you a bird's-eye view of your
+ app's complete <a href=
+ "http://developer.android.com/guide/topics/ui/overview.html#Layout">View</a> <a href=
+ "http://developer.android.com/guide/topics/ui/overview.html#Layout">Hierarchy</a>.</li>
+
+ <li>In the <b>Tree Overview</b>, move the gray viewport rectangle to change what section of
+ your hierarchy shows in the <b>Tree View</b> pane (in the center).</li>
+
+ <li>In the <b>Tree View</b>, you can drag and zoom the tree using your mouse.</li>
+ </ul>
+ </ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="15">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image009.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 7. </strong>Parts of the View node display.
+ </p>
+ </div>
+
+ <li>Click on a View node to display details. Here is an annotated close-up of a node
+ and its details.</li>
+
+
+ </ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="16">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image010.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 8. </strong>Location of View Properties tab.
+ </p>
+ </div>
+
+ <li>Click the <b>View Properties</b> tab at the top right (next to the Windows tab) to see
+ properties of the selected View node.</li>
+
+ </ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="17">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image011.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 9. </strong>Rendering a view in a popup.
+ </p>
+ </div>
+
+ <li>Double-click a View node in the Tree View to render it in a popup window.</li>
+
+ </ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="18">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image012.png"
+ alt=""
+ width="240px" />
+ <p class="img-caption">
+ <strong>Figure 10. </strong>Node with its type and id.
+ </p>
+ </div>
+
+ <li>Nodes in the Tree View show a Type, which indicates the View class,
+ and an id, which is the view identifier in your code.</li>
+
+ </ol>
+</div></li>
+</ul>
diff --git a/docs/html/tools/performance/hierarchy-viewer/profiling.jd b/docs/html/tools/performance/hierarchy-viewer/profiling.jd
new file mode 100644
index 0000000..b505228
--- /dev/null
+++ b/docs/html/tools/performance/hierarchy-viewer/profiling.jd
@@ -0,0 +1,169 @@
+page.title=Profiling with Hierarchy Viewer
+meta.tags="android, performance, profiling, tools, rendering, hierarchyviewer
+page.tags="android", "performance", "profiling", "tools", "rendering", "hierarchyviewer"
+page.metaDescription=Profile the relative rendering speed for each view.
+page.image=tools/performance/thumbnails/tools_hierarchy_viewer_profiling.png
+page.article=true
+
+@jd:body
+
+<style>
+ .no-bullet {
+ list-style-type: none;
+ }
+ .padded {
+ padding-left: 10px;
+ }
+</style>
+
+<div id="tb" style="margin-left: 7px; margin-bottom: 5px;">
+
+<h2>In this document</h2>
+<ul>
+ <li><a href="#WhatYouNeed">Prerequisites</a></li>
+ <li><a href="#ProfilingWithHierarchyViewer">Profiling with Hierarchy Viewer</a></li>
+ <li><a href="#InterpretingResults">Interpreting Profiling Results</a></li>
+
+</ul>
+</div>
+
+<p>This walkthrough shows you how to profile your app's view hiearchy with
+ Hierarchy Viewer, and how to interpret the results.</p>
+
+<h2 id="WhatYouNeed">Prerequisites</h2>
+
+<ul>
+ <li><a href="{@docRoot}tools/performance/hierarchy-viewer/setup.html">
+ Device Setup for Hierarchy Viewer</a></li>
+ <li><a href="{@docRoot}tools/performance/hierarchy-viewer/index.html">
+ Hierarchy Viewer Walkthrough</a></li>
+</ul>
+
+<h2 id="ProfilingWithHierarchyViewer">Profiling Steps</h2>
+
+<ul class="no-bullet">
+<!-- this also hides bullet, by default outside box -->
+ <li><div style="overflow:hidden">
+
+ <ol class="padded">
+
+ <div class="figure" style="">
+<img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image014.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 1. </strong>View hierarchy after profiling.
+ </p>
+ </div>
+
+ <li>Start Hierarchy Viewer for your app.</li>
+
+ <li>In the <b>Tree View</b> or the <b>Layout View</b>, click on the View node whose
+ children you want to profile.</li>
+
+ <li>To start profiling, click the small button with three circles
+<img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image013.png">
+ at the top of the Tree View.
+
+ </li>
+
+ <li>For large view hierarchies, profiling may take a few seconds.</li>
+
+ <li>Each view in your subtree gets three dots, which can be green, yellow, or red.
+
+ <ul>
+ <li>The left dot represents the Draw Process of the rendering pipeline.</li>
+ <li>The middle dot represents the Layout Phase.</li>
+ <li>The right dot represents the Execute Phase.</li>
+ </ul>
+ </li>
+
+</ol></div>
+
+</li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="5">
+
+ <div class="figure" style="">
+<img src="{@docRoot}images/tools/performance/hierarchy-viewer/gettingstarted_image015.png"
+ alt=""
+ width="240px" />
+ <p class="img-caption">
+ <strong>Figure 2. </strong>How the colored dots relate<br>to the rendering pipeline.
+ </p>
+ </div>
+
+ <li>These dots roughly correspond to the Measure,
+ Layout, and Draw
+ phases of the processing pipeline.</li>
+
+ <li>The color of the dots indicates the relative performance
+ of this node in respect to all other profiled nodes.
+
+ <ul>
+ <li><strong>Green</strong> means the view renders faster than at least
+ half of the other views.</li>
+
+ <li><strong>Yellow</strong> means the view renders faster than the bottom
+ half of the other views.</li>
+
+ <li><strong>Red</strong> means the view is among the slowest
+ half of views.</li>
+ </ul>
+ </li>
+
+ </ol>
+</div></li>
+</ul>
+
+ <h2 id="InterpretingResults">Interpreting Hierarchy Viewer Profiling Results</h2>
+
+ <p>Hierarchy Viewer measures the <em>relative performance</em> of a
+ node</b>, so there are always red nodes in a profile, and it
+ doesn't necessarily mean that view is too slow for the users of
+ your app.</p>
+
+ <p>Hierarchy Viewer software rasterizes your Activity to acquire the timing
+ information. Rasterization is the process of taking a high-level primitive, such as a
+ circle or a vector font, and turning it into pixels on the screen. Typically,
+ rasterization is done by the GPU on your device, but in the case of
+ software rasterization, rendering is done on the CPU with
+ ordinary software. This means that the absolute
+ reported timings are correct relative to each other, but are bloated and vary
+ depending on the overall and changing CPU workload on your device and PC. Profile
+ several times to get a feel for the average measurements.</p>
+
+ <p>The following are guidelines for interpreting Hierarchy Viewer profiling output.</p>
+
+ <p>A red node is a potential problem in any situation where your app has
+ unexpectedly slow performance. In a relative setting, there is always a
+ slowest node; make sure it is the node you expect.
+ The following examples illustrate how to interpret red dots.</p>
+
+ <ul>
+ <li>Look for red dots in leaf nodes or view groups with only a few children. This
+ might point to a problem. Your app may not be slow, or it may not be slow on your
+ device, but you need to be aware of why that dot is red.
+ <a href="{@docRoot}tools/performance/systrace/index.html"> Systrace</a> or
+ <a href="{@docRoot}tools/performance/traceview/index.html"> Traceview</a>
+ can give you additional information. </li>
+
+ <li>If you have a view group with many children and a red measure phase, take a
+ look at the children to see how they are performing.</li>
+
+ <li>A view with yellow or even red dots might not be performing slowly on the
+ device. That's where the actual numbers are helpful.
+ <a href="{@docRoot}tools/performance/systrace/index.html"> Systrace</a> or
+ <a href="{@docRoot}tools/performance/traceview/index.html"> Traceview</a>
+ can give you additional information.</li>
+
+ <li>If the root view of a hierarchy has a red measure phase, red layout phase, and
+ yellow draw phase, this is somewhat typical, because it's the
+ parent of all the other views.</li>
+
+ <li>If a leaf node in a tree with 20+ views has a red draw phase, this <i>is</i> a
+ problem. Check your OnDraw method for code that shouldn't be
+ there.</li>
+ </ul>
diff --git a/docs/html/tools/performance/hierarchy-viewer/setup.jd b/docs/html/tools/performance/hierarchy-viewer/setup.jd
new file mode 100644
index 0000000..aaac1ca
--- /dev/null
+++ b/docs/html/tools/performance/hierarchy-viewer/setup.jd
@@ -0,0 +1,89 @@
+page.title=Device Setup for Hierarchy Viewer
+meta.tags="android, performance, profiling, tools, rendering, hierarchyviewer"
+page.tags="android", "performance", "profiling", "tools", "rendering", "hierarchyviewer"
+page.metaDescription=Set up your mobile device to work with Hierarchy Viewer.
+page.image=tools/performance/thumbnails/tools_hierarchy_viewer.png
+page.article=true
+
+@jd:body
+
+<div id="tb" style="margin-left: 7px; margin-bottom: 5px;">
+
+<h2>You should also read</h2>
+<ul>
+ <li><a href="{@docRoot}tools/performance/hierarchy-viewer/index.html">
+ Hierarchy Viewer Walkthrough</a></li>
+ <li><a href="{@docRoot}tools/performance/hierarchy-viewer/profiling.html">
+ Profiling with Hierarchy Viewer</a></li>
+</ul>
+
+</div>
+
+ <p>To run Hierarchy Viewer, you must enable Developer Options on your mobile device and perform
+ some setup on your computer.</p>
+
+ <h2>Configuring Devices</h2>
+
+ <ol>
+ <li><p>Enable <a href=
+ "http://developer.android.com/tools/device.html#developer-device-options">Developer Options</a>
+ on your mobile device.</p></li>
+
+ <li>Depending on the type of device you have, do one of the following:
+ <ul>
+ <li>If you have a locked device running Android 4.0 or lower, follow the instructions
+ for <a href=
+ "https://github.com/romainguy/ViewServer">installing and configuring ViewServer</a>.
+ </li>
+ <li>If you have an unlocked device running Android 4.0 or lower,
+ no further configuration is needed.</li>
+ <li>If you have a device running Android 4.1 or higher, you must set an environment
+ variable on your development machine. For more information,
+ see <a href="#hvproto-variable">Setting the ANDROID_HVPROTO variable</a>
+ </ul>
+ </li>
+ </ol>
+
+
+ <h2 id="hvproto-variable">Setting the ANDROID_HVPROTO variable</h2>
+
+ <h3>Windows</h3>
+
+ <ol>
+ <li>Click <b>My Computer > Property > Advanced > Environment Variables.</b></li>
+
+ <li>Click <b>New.</b></li>
+
+ <li>In variables name put: <code>ANDROID_HVPROTO</code></li>
+
+ <li>In variable value put: <code>ddm</code></li>
+
+ <li>Click <b>OK</b><./li>
+ </ol>
+
+ <h3>Mac</h3>
+
+ <ol>
+ <li>Edit <code>~/.bash_profile</code></li>
+
+ <li>Add:
+ <br><code>#Hierarchy Viewer Variable
+ <br>export ANDROID_HVPROTO=ddm</code>
+ </li>
+
+ <li><code>source ~/.bash_profile</code></li>
+ </ol>
+
+ <h3>Linux</h3>
+
+ <ol>
+ <li>Edit <code>~/.bash_profile</code></li>
+
+ <li>Add:
+
+ <br><code>#Hierarchy Viewer Variable
+ <br>export ANDROID_HVPROTO=ddm</code>
+ </li>
+
+ <li><code>source ~/.bash_profile</code></li>
+ </ol>
diff --git a/docs/html/tools/performance/importing-legacy-apps.jd b/docs/html/tools/performance/importing-legacy-apps.jd
new file mode 100644
index 0000000..cee3519
--- /dev/null
+++ b/docs/html/tools/performance/importing-legacy-apps.jd
@@ -0,0 +1,149 @@
+page.title=Importing Legacy Apps into Android Studio
+meta.tags="android, performance, profiling, tools"
+page.tags="android", "performance", "profiling", "tools"
+page.metaDescription=Required changes when importing legacy apps into Android Studio.
+page.article=true
+
+@jd:body
+
+<div id="tb" style="margin-left: 7px; margin-bottom: 5px;">
+
+<h2>In this document</h2>
+<ul>
+ <li><a href="#WhatYouNeed">Prerequisites</a></li>
+ <li><a href="#StepsForImporting">Steps for Importing</a></li>
+</ul>
+
+<h2>You should also read</h2>
+<ul>
+ <li><a href="/tools/device.html">Using Hardware Devices</a></li>
+ <li><a href="/tools/help/index.html">Tools</a></li>
+</ul>
+
+</div>
+
+
+ <p>Importing some pre-Android-1.0 projects into Android 1.0 or newer can trigger a series of
+ errors. This document shows you how to resolve them, using a version of the Sunshine app used in
+ the <a href="https://www.udacity.com/course/ud853">Android Fundamentals Udacity Course</a> as an
+ example.</p>
+
+ <p><b>CAVEAT:</b> As with all documentation of this kind, the details are likely to vary for each
+ application and each update of Android Studio.</p>
+
+ <h2 id="WhatYouNeed">Prerequisites</h2>
+
+ <ul>
+ <li>The latest version of <a href="http://developer.android.com/sdk/index.html">Android
+ Studio</a> (this document uses version 1.1).</li>
+
+ <li>It helps to know how to <a href="https://developer.android.com/training/index.html">build
+ and run apps from Android Studio</a> on your device.</li>
+
+ <li>To use Sunshine, you need to download code from <a href=
+ "https://github.com/">github.com</a>. More info at <a href=
+ "https://help.github.com/">help.github.com</a>.</li>
+ </ul>
+
+ <h2 id="StepsForImporting">Steps for Importing Sunshine into Android Studio 1.1.0</h2>
+
+ <ol>
+ <li>Download Sunshine ZIP from GitHub: <a href=
+ "https://github.com/udacity/sunshine/tree/6.10-update-map-intent">https://github.com/udacity/sunshine/tree/6.10-update-map-intent</a>.
+ (If you are having any problems with Android Studio or the app, use the following version, or
+ your own app, to follow along with the example.<a href=
+ "https://github.com/udacity/sunshine/tree/3.13-add-share-action-provider">https://github.com/udacity/sunshine/tree/3.13-add-share-action-provider</a>)
+
+ <li>Unzip the application to extract the code folder.</li>
+
+ <li>Start Android Studio. (This works best if you close all projects, then restart.)</li>
+
+ <li>Click <b>Import</b> <b>project (Eclipse ADT, Gradle, etc.)</b>.
+ <br><img src="{@docRoot}images/tools/performance/import_image001.png">
+ </li>
+
+ <li>In the popup, find and select the Sunshine-6-10-updated-map-intent folder and click
+ <b>OK</b>.
+ <br><img src="{@docRoot}images/tools/performance/import_image002.png">
+ </li>
+
+ <li>If prompted, choose a destination folder for your project. If prompted to choose a build
+ system, choose Gradle. (These prompts vary, depending on your project and Android Studio
+ version.) If you need more guidance, see this <a href=
+ "http://www.lynda.com/articles/eclipse-into-android-studio">Lynda tutorial</a>.</li>
+
+ <li>Wait for the import to complete. If you see no errors, you are now ready to work with your
+ app.
+
+ <p><b>If you get a Gradle error:</b></p>
+
+ <li>If you get a Gradle error, you have some extra work to do.(Because the Import
+ didn(t finish, at this point, you may only see the <b>Gradle
+ Scripts</b> directory in your Project view.)</li>
+
+ <li>You may see the link <b>Install missing platform(s) and sync
+ project</b>, or a link to install missing build tools.
+ Click whatever link and
+ proceed.</li>
+
+ <li>The next time through, your build will fail with:
+ <br><img src="{@docRoot}images/tools/performance/import_image003.png">
+ </li>
+
+ <li>Click the <b>Fix plugin version and re-import project</b> link
+ in the error message. This will rebuild the app and present you with new of errors.
+ <br><img src="{@docRoot}images/tools/performance/import_image004.png">
+ </li>
+
+ <li>Click the <b>Gradle Settings</b> link in the error message.</li>
+
+ <li>Check the <b>Use auto-import</b> and click <b>OK</b>.
+ <br><img src="{@docRoot}images/tools/performance/import_image005.png">
+ </li>
+
+ <li>Expand the project hierarchy and find the <b>build.gradle file</b>.The file you are looking
+ for is not the one showing at the top level, but the one inside <b>Sunshine</b> <b>></b>
+ <b>app > build.gradle</b>, as shown below.
+ <br><img src="{@docRoot}images/tools/performance/import_image006.png">
+ </li>
+
+ <li>Double-click the <code>build.gradle</code> file.</li>
+
+ <li>Make the following changes to the file:</li>
+ <ul>
+ <li>Set <code>compileSdkVersion 21</code></li>
+
+ <li>Set <code>targetSdkVersion 21</code></li>
+
+ <li>Replace <code>runProguard</code> with <code>minifyEnabled</code></li>
+ </ul>
+
+ <p>Your file should look like this: </p>
+ <img src="{@docRoot}images/tools/performance/import_image007.png">
+ </li>
+
+ <li>Save (Ctrl-S).</li>
+
+ <p>For the following two messages (Steps 18/19), what you see might vary. You might see either
+ message or both messages in sequence. Click the appropriate links to continue until the Language
+ Level Changed dialog opens.</p>
+
+ <li>In the code view bar, click the <b>Try again</b> link.
+ <br><img src="{@docRoot}images/tools/performance/import_image008.png">
+ </li>
+
+ <li>If you see these warnings, click the <b>Sync now</b> link.
+ <br><img src="{@docRoot}images/tools/performance/import_image009.png">
+ </li>
+
+ <li>In the Language Level Changed dialog, click <b>Yes</b>. And if you get the Gradle Running
+ dialog, <b>Yes</b> again.
+ <br><img src="{@docRoot}images/tools/performance/import_image010.png">
+ </li>
+
+ <li>After the project reloads, run the app on your device. (If it crashes the first time, try
+ again, and it will run.)
+ <br><img src="{@docRoot}images/tools/performance/import_image011.png">
+ </li>
+ </ol>
+
diff --git a/docs/html/tools/performance/index.jd b/docs/html/tools/performance/index.jd
new file mode 100644
index 0000000..fa5af86
--- /dev/null
+++ b/docs/html/tools/performance/index.jd
@@ -0,0 +1,73 @@
+page.title=Performance Profiling Tools
+meta.tags="android, develop, performance, profiling, tools, gather"
+page.tags="android", "develop", "performance", "profiling", "tools" "gather"
+page.metaDescription=Android Studio profiling tools for evaluating your app's performance.
+page.article=true
+
+@jd:body
+
+ <p>Putting pixels on the screen involves four primary pieces of hardware.
+ To greatly simplify, the CPU computes display lists, the GPU renders images to
+ the display, the memory stores images and data, and the battery provides
+ electrical power. Each of these pieces of hardware has constraints; pushing
+ or exceeding those constraints causes your app to be slow, have
+ bad display performance, or exhaust the battery.
+
+ <p>To discover what causes your specific performance problems, you need to
+ take a look under the hood, use tools to collect data about your app's
+ execution behavior, surface that data as lists and
+ graphics, understand and analyze what you see, and improve your code.</p>
+
+ <p>Android Studio and your device provide profiling tools to record and
+ visualize the rendering, compute, memory, and battery performance of your
+ app.</p>
+
+<h2 id="rendering-tools">Rendering Analysis Tools</h2>
+
+<p>Visualize the rendering behavior and performance of your app.</p>
+
+<div class="dynamic-grid">
+ <div class="resource-widget resource-flow-layout landing col-12"
+ data-query="collection:tools/performance/rendering"
+ data-cardSizes="9x3"
+ data-maxResults="6">
+ </div>
+</div>
+
+<h2 id="memory-tools">Memory Analysis Tools</h2>
+
+<p>Visualize the memory behavior and performance of your app.</p>
+
+<div class="dynamic-grid">
+ <div class="resource-widget resource-flow-layout landing col-12"
+ data-query="collection:tools/performance/memory"
+ data-cardSizes="9x3"
+ data-maxResults="6">
+ </div>
+</div>
+
+<h2 id="cpu-tools">Compute Analysis Tools</h2>
+
+<p>Visualize the CPU behavior and performance of your app.</p>
+
+<div class="dynamic-grid">
+ <div class="resource-widget resource-flow-layout landing col-12"
+ data-query="collection:tools/performance/cpu"
+ data-cardSizes="9x3"
+ data-maxResults="4">
+ </div>
+</div>
+
+<h2 id="battery-tools">Battery Analysis Tools</h2>
+
+<p>Visualize the battery behavior and performance of your app.</p>
+
+<div class="dynamic-grid">
+ <div class="resource-widget resource-flow-layout landing col-12"
+ data-query="collection:tools/performance/battery"
+ data-cardSizes="9x3"
+ data-maxResults="4">
+ </div>
+</div>
+
+
diff --git a/docs/html/tools/performance/memory-monitor/index.jd b/docs/html/tools/performance/memory-monitor/index.jd
new file mode 100644
index 0000000..756ca14
--- /dev/null
+++ b/docs/html/tools/performance/memory-monitor/index.jd
@@ -0,0 +1,172 @@
+page.title=Memory Monitor Walkthrough
+meta.tags="android, performance, profiling, tools, memory, memoryleaks, garbagecollection, memorymonitor"
+page.tags="android", "performance", "profiling", "tools", "memory", "memoryleaks", "garbagecollection", "memorymonitor"
+page.metaDescription=Graph memory usage and garbage collection events for your app in real-time.
+page.image=tools/performance/thumbnails/tools_memory_monitor.png
+page.article=true
+
+@jd:body
+
+<style>
+ .no-bullet {
+ list-style-type: none;
+ }
+ .padded {
+ padding-left: 10px;
+ }
+</style>
+
+<div id="tb" style="margin-left: 7px; margin-bottom: 5px;">
+
+<h2>In this document</h2>
+<ul>
+ <li><a href="#WhatYouNeed">Prerequisites</a></li>
+ <li><a href="#WorkingWithMemoryMonitor">Working with Memory Monitor</a></li>
+</ul>
+
+<h2>You should also read</h2>
+<ul>
+ <li><a href="{@docRoot}tools/performance/heap-viewer/index.html">
+ Heap Viewer Walkthrough</a></li>
+ <li><a href="{@docRoot}tools/performance/allocation-tracker/index.html">
+ Allocation Tracker Walkthrough</a></li>
+ <li><a href="{@docRoot}tools/performance/comparison.html">
+ Comparison: Memory Monitor, Heap Viewer, Allocation Tracker</a>
+ <li><a href="{@docRoot}tools/performance/traceview/index.html">
+ Traceview Walkthrough</a></li>
+</ul>
+
+</div>
+
+
+ <p>This walkthrough shows the basic usage and workflow for the Memory Monitor tool in Android
+ Studio. Memory Monitor reports in real-time how your app allocates memory.</p>
+
+ <p>What it's good for:</p>
+
+ <ul>
+ <li>Showing available and used memory in a graph, and garbage collection events over time.</li>
+
+ <li>Quickly testing whether app slowness might be related
+ to excessive garbage collection events.</li>
+
+ <li>Quickly testing whether app crashes may be related to running out of
+ memory.</li>
+ </ul>
+
+ <h2 id="WhatYouNeed">Prerequisites</h2>
+
+ <ul>
+ <li>A mobile device with <a href=
+ "http://developer.android.com/tools/device.html#developer-device-options">Developer Options</a>
+ enabled.</li>
+
+ <li>An Application with USB Debugging enabled. Use your own, or the <a href=
+ "https://github.com/udacity/Sunshine-Version-2">Sunshine</a> sample app from the <a href=
+ "https://www.udacity.com/course/ud853">Android Fundamentals Udacity course</a>.</li>
+ </ul>
+
+ <h2 id="WorkingWithMemoryMonitor">Working with Memory Monitor</h2>
+
+ <ul class="no-bullet">
+<!-- this also hides bullet, by default outside box -->
+ <li><div style="overflow:hidden">
+ <ol class="padded">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/memory-monitor/gettingstarted_image001.png"
+ alt=""
+ width="300px" />
+ <p class="img-caption">
+ <strong>Figure 1. </strong>Starting Memory Monitor.
+ </p>
+ </div>
+
+ <li>Connect your mobile device to your computer.</li>
+
+ <li>Open your application in Android Studio, build the source,
+ and run it on your device.</li></li>
+
+ <li>In Android Studio, choose <b>Tools > Android > Memory Monitor.</b></li>
+
+ </ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="4">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/memory-monitor/gettingstarted_image002.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 2. </strong>Choosing the device and Activity to monitor.
+ </p>
+ </div>
+
+ <li>This opens the Memory Monitor pane.</li>
+
+ <li>Choose your device from the drop-down menu at the top left of the pane.</li>
+
+ <li>Choose your Activity from the drop-down menu at the top right of the pane.</li>
+
+ </ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="7">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/memory-monitor/gettingstarted_image003.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 3. </strong>Allocated and free memory in Memory Monitor.
+ </p>
+ </div>
+
+ <li>Once Memory Monitor starts tracking your device, a stacked graph appears,
+ tracking memory usage over time.
+
+ <p>Dark blue: Amount of memory that your app
+ is currently using.</p>
+
+ <p>Light blue: Available, unallocated memory.</p>
+ </li>
+
+ <li>Over time, this graph updates, showing changes in memory usage.</li>
+
+ <li>As your app allocates and frees memory, the allocated amount shown in the
+ graph changes.</li>
+
+ <li>When you see the allocated memory drop by a large amount, a garbage
+ collection (GC) event has occurred.</li>
+
+ </ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="11">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/memory-monitor/gettingstarted_image005.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 4. </strong>Forcing a GC (Garbage Collection) event.
+ </p>
+ </div>
+
+ <li>You can force a garbage collection event by clicking on the garbage truck
+ icon
+<img src="{@docRoot}images/tools/performance/memory-monitor/gettingstarted_image004.png">.
+ </li>
+
+ </ol>
+</div></li>
+</ul>
+
+
diff --git a/docs/html/tools/performance/profile-gpu-rendering/index.jd b/docs/html/tools/performance/profile-gpu-rendering/index.jd
new file mode 100644
index 0000000..74862b5
--- /dev/null
+++ b/docs/html/tools/performance/profile-gpu-rendering/index.jd
@@ -0,0 +1,181 @@
+page.title=Profiling GPU Rendering Walkthrough
+meta.tags="android, performance, profiling, tools, rendering, gpu"
+page.tags="android", "performance", "profiling", "tools", "rendering", "gpu"
+page.metaDescription=Overlay a graph on your device, showing how long it takes to render UI elements relative to the 16-ms-per-frame benchmark.
+page.image=tools/performance/thumbnails/tools_profile_gpu_rendering.png
+page.article=true
+
+@jd:body
+
+<style>
+ .no-bullet {
+ list-style-type: none;
+ }
+ .padded {
+ padding-left: 10px;
+ }
+</style>
+
+<div id="tb" style="margin-left: 7px; margin-bottom: 5px;">
+
+<h2>In this document</h2>
+<ul>
+ <li><a href="#WhatYouNeed">Prerequisites</a></li>
+ <li><a href="#ProfileGPURendering">Profile GPU Rendering</a></li>
+</ul>
+
+<h2>You should also read</h2>
+<ul>
+ <li><a href="{@docRoot}tools/performance/debug-gpu-overdraw/index.html">
+ Debug GPU Overdraw Walkthrough</a></li>
+ <li><a href="{@docRoot}tools/performance/hierarchy-viewer/index.html">
+ Hierarchy Viewer Walkthrough</a></li>
+</ul>
+
+</div>
+
+ <p>This walkthrough shows how to use Profile GPU Rendering on your mobile device.</p>
+
+ <p>Profile GPU Rendering gives you a quick visual representation of how much time it takes to
+ render the frames of a UI window relative to the 16-ms-per-frame benchmark.</p>
+
+ <p>What it's good for:</p>
+
+ <ul>
+ <li>Quickly seeing how a UI window performs against the 16-ms-per-frame target.</li>
+
+ <li>Identifying whether any part of the rendering pipeline stands out in using processing
+ time.</li>
+
+ <li>Looking for spikes in frame rendering time associated with user or program actions.</li>
+ </ul>
+
+ <h2 id="WhatYouNeed">Prerequisites</h2>
+
+ <ul>
+ <li>A mobile device running at least Android 4.1 with <a href=
+ "http://developer.android.com/tools/device.html#developer-device-options">Developer Options</a>
+ enabled.</li>
+ </ul>
+
+<h2 id="ProfileGPURendering">Working with Profile GPU Rendering</h2>
+
+<ul class="no-bullet">
+<!-- this also hides bullet, by default outside box -->
+ <li><div style="overflow:hidden">
+ <ol class="padded">
+
+ <div class="figure" style="">
+ <img
+src="{@docRoot}images/tools/performance/profile-gpu-rendering/gettingstarted_image001.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 1. </strong>Turning on Profile GPU Rendering.
+ </p>
+ </div>
+
+ <li>On your mobile device, go to <b>Settings ></b> <b>Developer Options</b>.</li>
+
+ <li>In the <em>Monitoring</em> section, select <b>Profile GPU Rendering</b>.</li>
+
+ <li>In the Profile GPU Rendering popup, choose <b>On screen as bars</b> to overlay the graphs
+ on the screen of your mobile device.</li>
+
+ <li>Go to the app that you want to profile.</li>
+
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+
+ <div class="figure" style="">
+ <img
+src="{@docRoot}images/tools/performance/profile-gpu-rendering/gettingstarted_image002.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 2. </strong>Screen when Profile GPU Rendering is on.
+ </p>
+ </div>
+
+ <h3>What you see:</h3>
+
+ <ul>
+ <li>For each visible application, the tool displays a graph.</li>
+
+ <li>The horizontal axis shows time elapsing, and the vertical axis time per frame in
+ milliseconds.</li>
+
+ <li>As you interact with your application, vertical bars show up on your screen, appearing
+ from left to right, graphing frame performance over time.</li>
+
+ <li>Each vertical bar represents one frame of rendering.
+ The taller the bar, the longer it took to render.</li>
+
+ <li>The green line marks the 16 millisecond target. Every time a frame crosses the green line,
+ your app is missing a frame, and your users may see this as stuttering images.
+ </ul>
+
+</div></li>
+
+<li style="list-style-type:none;><!-- fix issue with visible disc -->
+<div style="overflow:hidden">
+<hr>
+
+ <h3>The Profile GPU Rendering Graph</h3>
+
+ <img
+src="{@docRoot}images/tools/performance/profile-gpu-rendering/gettingstarted_image003.png"
+ alt=""
+ height="" />
+ <p class="img-caption">
+ <strong>Figure 3. </strong>Enlarged Annotated Profile GPU Rendering graph.
+ </p>
+
+ <p>In this enlarged image of the Profile GPU Rending graph you can see the colored sections
+ of the graph, and what phase of the rendering pipeline each color represents.</p>
+
+ <ul>
+ <li>The <b>green line</b> represents 16 milliseconds. To achieve 60 frames per second,
+ the vertical bar for each frame needs
+ to stay below this 16 ms mark. Any time a bar pushes above this line, there may be pauses in
+ the animations.</li>
+
+ <li>Each bar has a blue, purple (only for Android version 4.0 and higher),
+ red, and orange component.</p>
+
+ <li>The <b>blue</b> section of the bar represents the time used to create and update the
+ View's display lists. If this part of the bar is tall, there may be a
+ lot of custom view drawing, or a lot of work in onDraw methods.</li>
+
+ <li>Android 4.0 and higher: The <b>purple</b> section of the bar represents the time spent
+ transferring resources to the render thread.</li>
+
+ <li>The <b>red</b> section of the bar represents the time spent by
+ Android's 2D renderer issuing commands to OpenGL to draw and redraw
+ display lists. The height of this bar is directly proportional to the sum of the time it takes each
+ display list to execute—more display lists equals a taller red bar.</li>
+
+ <li>The <b>orange</b> section of the bar represents the time the CPU is waiting for the GPU to
+ finish its work. If this bar gets tall, it means the app is doing too much work on the GPU.
+ </li>
+ </ul>
+
+ <p class="note"><strong>Note:</strong>
+ While this tool is named Profile GPU Rendering, all monitored processes actually
+ occur in the CPU. Rendering happens by submitting commands to the GPU, and the GPU renders the
+ screen asynchronously. In certain situations, the GPU can have too much work to do,
+ and your CPU will have to wait before it can submit new commands.
+ When this happens, you'll see spikes in the Process (orange bar) and Execute (red bar)
+ stages, and the sommand submission will block until more room is made on the
+ GPU command queue.
+ </p>
+
+ </div></li>
+</ul>
+
+
+
+
diff --git a/docs/html/tools/performance/systrace/index.jd b/docs/html/tools/performance/systrace/index.jd
new file mode 100644
index 0000000..97099a0
--- /dev/null
+++ b/docs/html/tools/performance/systrace/index.jd
@@ -0,0 +1,182 @@
+page.title=Systrace Walkthrough
+meta.tags="android, performance, profiling, tools, compute, systrace"
+page.tags="android", "performance", "profiling", "tools", "compute", "systrace"
+page.metaDescription=Collect system and application process execution data to identify performance bottlenecks.
+page.image=tools/performance/thumbnails/tools_systrace.png
+page.article=true
+
+@jd:body
+
+<style>
+ .no-bullet {
+ list-style-type: none;
+ }
+ .padded {
+ padding-left: 10px;
+ }
+</style>
+
+<div id="tb" style="margin-left: 7px; margin-bottom: 5px;">
+
+<h2>In this document</h2>
+<ul>
+ <li><a href="#WhatYouNeed">Prerequisites</a></li>
+ <li><a href="#WorkingWithSystrace">Working with Systrace</a></li>
+</ul>
+
+<h2>You should also read</h2>
+<ul>
+ <li><a href="{@docRoot}tools/performance/traceview/index.html">
+ Traceview Walkthrough</a></li>
+ <li><a href="{@docRoot}tools/performance/allocation-tracker/index.html">
+ Allocation Tracker Walkthrough</a></li>
+</ul>
+
+</div>
+
+ <p>This walkthrough shows the basic usage and workflow for the Systrace tool in the Android
+ Device Monitor.</p>
+
+ <p>Systrace collects system and application process execution data and generates detailed,
+ interactive reports from devices running Android 4.1 and higher.</p>
+
+ <p>What it's good for:</p>
+
+ <ul>
+ <li>Evaluating container performance.</li>
+
+ <li>Finding performance bottlenecks in the execution of your code.</li>
+ </ul>
+
+ <h2 id="WhatYouNeed">Prerequisites</h2>
+
+ <ul>
+ <li>Android SDK Tools 20.</li>
+
+ <li><a href="http://www.python.org/">Python</a> installed and included in your development
+ computer's execution path.</li>
+
+ <li>A mobile device running at least Android 4.1 with <a href=
+ "http://developer.android.com/tools/device.html#developer-device-options">Developer Options</a>
+ and USB Debugging enabled in Developer Options.</li>
+
+ <li>Application code. Use your own code, or the <a href=
+ "https://github.com/udacity/Sunshine-Version-2">Sunshine</a> sample app from the <a href=
+ "https://www.udacity.com/course/ud853">Android Fundamentals Udacity course</a>.</li>
+ </ul>
+
+ <h2 id="WorkingWithSystrace">Working with Systrace</h2>
+
+<ul class="no-bullet">
+<!-- this also hides bullet, by default outside box -->
+ <li><div style="overflow:hidden">
+ <ol class="padded">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/systrace/gettingstarted_image001.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 1. </strong>Starting Android Device Monitor.
+ </p>
+ </div>
+
+ <li>Connect your mobile device to your computer.</li>
+
+ <li>Open your application in Android Studio, build the source, and run it on your device.</li>
+
+ <li>From Android Studio, start the Android Device Monitor: <b>Tools -> Android -> Android
+ Device</b> <b>Monitor</b>.
+
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="4">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/systrace/gettingstarted_image003.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 2. </strong>Steps for starting Systrace.
+ </p>
+ </div>
+
+ <li>Make sure your
+ device and the package for your application are showing in the Devices (DDMS mode) or
+ Windows (Hierarchy Viewer mode) tab.
+
+ <p>You can choose <b>Window > Reset Perspective</b> to
+ get back to the default arrangement.</p>
+ </li>
+
+ <li>Click the <b>DDMS</b> button, because Systrace is one of the DDMS tools.</li>
+
+ <li>Click the <b>Systrace</b> button
+ <img src="{@docRoot}images/tools/performance/systrace/gettingstarted_image002.png">.</li>
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="7">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/systrace/gettingstarted_image004.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 3. </strong>Steps for creating a trace.
+ </p>
+ </div>
+
+ <li>In the <b>Android System Trace</b> popup, choose your settings for the trace.
+
+ <ul>
+ <li><b>Destination File:</b> Where the trace is stored as an HTML file. Default is in
+ your home directory as <code>trace.html</code>.</li>
+
+ <li><b>Trace Duration:</b> Default is 5 seconds,
+ and 30 seconds is a good time to choose.</li>
+
+ <li><b>Trace Buffer size:</b> Default is unlimited.</li>
+
+ <li><b>Enable Application Traces from:</b> Make sure your app is selected.</li>
+
+ <li><b>Select tags to enable:</b> Choose at least one value to trace, for example Graphics
+ and View System.</li>
+ </ul>
+ </li>
+
+ <li>Click <b>OK</b> to start tracing.</li>
+
+ <li>Interact with your app.</li>
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="10">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/systrace/gettingstarted_image005.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 4. </strong>Example systrace output in browser.
+ </p>
+ </div>
+
+ <li>When the trace is done, you are automatically returned to Android Device Monitor.</li>
+
+ <li>Go to your home directory, or the directory you chose as the file destination.</li>
+
+ <li>Open the <code>trace.html</code> file in your browser.</li>
+
+ </ol>
+</div></li>
+</ul>
+
+
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diff --git a/docs/html/tools/performance/traceview/index.jd b/docs/html/tools/performance/traceview/index.jd
new file mode 100644
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+++ b/docs/html/tools/performance/traceview/index.jd
@@ -0,0 +1,292 @@
+page.title=Traceview Walkthrough
+meta.tags="android, performance, profiling, tools, compute, traceview"
+page.tags="android", "performance", "profiling", "tools", "compute", "traceview"
+page.metaDescription=Log method execution over time and inspect execution data, per-thread timelines, and call stacks to track down performance issues in your source code.
+page.image=tools/performance/thumbnails/tools_traceview.png
+page.article=true
+
+@jd:body
+
+<style>
+ .no-bullet {
+ list-style-type: none;
+ }
+ .padded {
+ padding-left: 10px;
+ }
+</style>
+
+<div id="tb" style="margin-left: 7px; margin-bottom: 5px;">
+
+<h2>In this document</h2>
+<ul>
+ <li><a href="#WhatYouNeed">Prerequisites</a></li>
+ <li><a href="#WorkingWithTraceview">Working with Traceview</a></li>
+</ul>
+
+<h2>You should also read</h2>
+<ul>
+ <li><a href="{@docRoot}tools/performance/heap-viewer/index.html">
+ Heap Viewer Walkthrough</a></li>
+ <li><a href="{@docRoot}tools/performance/systrace/index.html">
+ Systrace Walkthrough</a></li>
+</ul>
+
+</div>
+
+ <p>This walkthrough shows the basic usage and workflow for the Traceview tool. Traceview logs
+ method execution over time and shows execution data, per-thread timelines, and call stacks.</p>
+
+ <p>What it's good for:</p>
+
+ <ul>
+ <li>Tracking down performance problems in your source code.</li>
+ </ul>
+
+ <h2 id="WhatYouNeed">Prerequisites</h2>
+
+ <ul>
+ <li>A mobile device with <a href=
+ "http://developer.android.com/tools/device.html#developer-device-options">Developer Options</a>
+ enabled.</li>
+
+ <li>Application code. Use your own code, or the <a href=
+ "https://github.com/udacity/Sunshine-Version-2">Sunshine</a> sample app from the <a href=
+ "https://www.udacity.com/course/ud853">Android Fundamentals Udacity course</a>.</li>
+ </ul>
+
+<h2 id="WorkingWithTraceview">Working with Traceview</h2>
+
+<ul class="no-bullet">
+<!-- this also hides bullet, by default outside box -->
+ <li><div style="overflow:hidden">
+ <ol class="padded">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/traceview/gettingstarted_image001.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 1. </strong>Steps for starting Android Device Monitor.
+ </p>
+ </div>
+
+ <li>Connect your mobile device to your computer.</li>
+
+ <li>Open your application in Android Studio, build the source, and run it on your device.</li>
+
+ <li>Start the Android Device Monitor from Android Studio: <b>Tools -> Android -> Android
+ Device</b> <b>Monitor</b>.
+
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="4">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/traceview/gettingstarted_image002.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 2. </strong>Steps for starting Traceview.
+ </p>
+ </div>
+
+ <li>Make sure your device
+ and the package for your application are showing in the <b>Devices</b> (DDMS mode) or
+ <b>Windows</b> (Hierarchy Viewer mode) tab.
+
+ <p>If necessary choose <b>Window > Reset
+ Perspective</b> to get back to the default pane arrangement.</p></li>
+
+ <li>Click the <b>DDMS</b> button, because Traceview is one of the DDMS tools.</li>
+
+ <li>Select the app you want to profile.
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="7">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/traceview/gettingstarted_image004.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 3. </strong>Starting profiling.
+ </p>
+ </div>
+
+ <li>Click the Start method profiling
+ <img src="{@docRoot}images/tools/performance/traceview/gettingstarted_image003.png">
+ button.
+ </li>
+
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="8">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/traceview/gettingstarted_image005.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 4. </strong>Choosing profiling options.
+ </p>
+ </div>
+
+ <li>In the <b>Profiling Options</b> popup:
+
+ <ul>
+ <li>Choose <b>Sample based profiling</b></li>
+
+ <li>Keep the default sampling rate of 1000 microseconds.</li>
+
+ <li>Click <b>OK</b>.</li>
+ </ul>
+ </li>
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="9">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/traceview/gettingstarted_image007.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 5. </strong>Stopping profiling.
+ </p>
+ </div>
+
+
+ <li>Interact with your application. If you are aware of performance issues that
+ your users experience, perform those actions.</li>
+
+ <li>Click the Stop method profiling
+ <img src="{@docRoot}images/tools/performance/traceview/gettingstarted_image006.png">
+ button.</li>
+
+ <li>Wait for the trace to load. This may take a few seconds if you recorded for a
+ long time.</li>
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="12">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/traceview/gettingstarted_image008.png"
+ alt=""
+ width="440px" />
+ <p class="img-caption">
+ <strong>Figure 6. </strong>Traceview output panes.
+ </p>
+ </div>
+
+ <li>Traceview has two panels: <b>Timeline</b> pane and <b>Profile</b> pane, which
+ are described below.</li>
+
+ <li>Use the <b>Find</b> box at the bottom to filter your profile results. For
+ example, if you are interested in finding the running time for a function, you can
+ search for it, and the tool will highlight it in the timeline.
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="14">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/traceview/gettingstarted_image009.png"
+ alt=""
+ width="400px" />
+ <p class="img-caption">
+ <strong>Figure 7. </strong>Annotated timeline panel.
+ </p>
+ </div>
+
+ <li>The <b>Timeline</b> pane visualizes how your code executes over time.
+
+ <ul>
+ <li>Each row shows a thread.</li>
+
+ <li>Each bar on the timeline is a method executing.</li>
+
+ <li>Each color is for a different method; every time a method executes, you see
+ a the same color bar.</li>
+
+ <li>The width of its bar indicates how long the method takes to execute.</li>
+ </ul>
+ </li>
+
+ <li>When you are zoomed out, a bar indicates when a method is executing.</li>
+
+ </ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="16">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/traceview/gettingstarted_image010.png"
+ alt=""
+ width="300px" />
+ <p class="img-caption">
+ <strong>Figure 8. </strong>Segment for method on the timeline.
+ </p>
+ </div>
+
+ <li>Zoom into the graph, and the bar for each method expands into a colored
+ U-shape, where the left side of the U indicates the start, and the right side
+ the end of the method's execution.</li>
+</ol>
+</div></li>
+
+<li><div style="overflow:hidden">
+<hr>
+ <ol class="padded" start="17">
+
+ <div class="figure" style="">
+ <img src="{@docRoot}images/tools/performance/traceview/gettingstarted_image011.png"
+ alt=""
+ width="440px" />
+ <p class="img-caption">
+ <strong>Figure 9. </strong>Traceview Profiling pane with callstack.
+ </p>
+ </div>
+
+ <li>The <b>Profiling</b> pane shows a list of methods.
+
+ <ul>
+ <li>Select a method to see who called it (Parent) and who it's
+ calling (Children).</li>
+
+ <li>The selected method is also highlighted in the <b>Timeline</b> pane.</li>
+
+ <li>The columns show exclusive and inclusive CPU and real times, percentages,
+ ratios, and how often a method was called.</li>
+
+ <li>The <em>exclusive time</em> is the time spent just in the method itself, which can
+ help you find issues within that specific method.</li>
+
+ <li>The <em>inclusive time</em> is for the method and all methods it calls, which
+ can help you find problems with your call tree.</li>
+
+ <li>The <b>Calls+Rec</b> column shows how many times a method was called recursively,
+ which can help you track down performance issues.</li>
+ </ul>
+ </li>
+ </ol>
+</div></li>
+</ul>
diff --git a/docs/html/tools/tools_toc.cs b/docs/html/tools/tools_toc.cs
index d92af04..54da711 100644
--- a/docs/html/tools/tools_toc.cs
+++ b/docs/html/tools/tools_toc.cs
@@ -194,10 +194,70 @@
</ul>
</li><!-- end of build system -->
+<!-- Performance Tools menu-->
+ <li class="nav-section">
+ <div class="nav-section-header">
+ <a href="<?cs var:toroot ?>tools/performance/index.html">Peformance Tools</a>
+ </div>
+ <ul>
+ <li><a href="<?cs var:toroot ?>tools/performance/debug-gpu-overdraw/index.html">
+ Overdraw Debugger</a>
+ </li>
+ <li><a href="<?cs var:toroot ?>tools/performance/profile-gpu-rendering/index.html">
+ Rendering Profiler</a>
+ </li>
+ <li class="nav-section">
+ <div class="nav-section-header">
+ <a href="<?cs var:toroot ?>tools/performance/hierarchy-viewer/index.html">
+ Hierarchy Viewer</a></div>
+ <ul>
+ <li><a href="<?cs var:toroot ?>tools/performance/hierarchy-viewer/setup.html"><span
+ class="en">Setup</span></a>
+ </li>
+ <li><a href="<?cs var:toroot ?>tools/performance/hierarchy-viewer/profiling.html"><span
+ class="en">Profiling</span></a>
+ </li>
+ </ul>
+ </li>
+ <li class="nav-section">
+ <div class="nav-section-header">
+ <a href="<?cs var:toroot ?>tools/performance/comparison.html">
+ Memory Profilers</a></div>
+ <ul>
+ <li><a href="<?cs var:toroot ?>tools/performance/memory-monitor/index.html"><span
+ class="en">Memory Monitor</span></a>
+ </li>
+ <li><a href="<?cs var:toroot ?>tools/performance/heap-viewer/index.html"><span
+ class="en">Heap Viewer</span></a>
+ </li>
+ <li><a href="<?cs var:toroot ?>tools/performance/allocation-tracker/index.html"><span
+ class="en">Allocation Tracker</span></a>
+ </li>
+ </ul>
+ </li>
+ <li><a href="<?cs var:toroot ?>tools/performance/traceview/index.html">
+ Traceview</a>
+ </li>
+ <li><a href="<?cs var:toroot ?>tools/performance/systrace/index.html">
+ Systrace</a>
+ </li>
+ <li class="nav-section">
+ <div class="nav-section-header">
+ <a href="<?cs var:toroot ?>tools/performance/batterystats-battery-historian/index.html">
+ Battery Profilers</a></div>
+ <ul>
+ <li><a href="<?cs var:toroot ?>tools/performance/batterystats-battery-historian/charts.html"><span
+ class="en">Historian Charts</span></a>
+ </li>
+ </ul>
+ </li>
+ </ul>
+ </li><!-- End Performance Tools menu-->
+
<!-- Testing Tools menu-->
<li class="nav-section">
- <div class="nav-section-header"><a href="<?cs var:toroot ?>tools/testing/testing-tools.html""><span class="en">Testing Tools</span></a></div>
+ <div class="nav-section-header"><a href="<?cs var:toroot ?>tools/testing/testing-tools.html"><span class="en">Testing Tools</span></a></div>
<ul>
<li class="nav-section">
<div class="nav-section-header"><a href="<?cs var:toroot ?>tools/testing-support-library/index.html"><span
diff --git a/docs/html/training/training_toc.cs b/docs/html/training/training_toc.cs
index 089739b..79f0cee 100644
--- a/docs/html/training/training_toc.cs
+++ b/docs/html/training/training_toc.cs
@@ -1628,20 +1628,11 @@
</ul>
</li> <!-- end of Background Jobs -->
- <li class="nav-section">
- <div class="nav-section-header">
- <a href="<?cs var:toroot ?>training/best-performance.html">
- <span class="small">Best Practices for</span><br/>
- Performance
- </a>
- </div>
- <ul>
-
<li>
<a href="<?cs var:toroot ?>training/articles/memory.html"
- description=
- "How to keep your app's memory footprint small in order to improve performance
- on a variety of mobile devices."
+ description=
+ "How to keep your app's memory footprint small in order to improve performance
+ on a variety of mobile devices."
>Managing Your App's Memory</a>
</li>
