tree 35b76eedc10d0cb138bfd57b43a4e3ca8b9546b5
parent ca8a8a999b271c65148e70970f6dda4389b8e458
author Jorim Jaggi <jjaggi@google.com> 1531151830 +0200
committer Jorim Jaggi <jjaggi@google.com> 1531487808 +0200

Pin compiled code of HOME app

Keeping the code in memory of the currently set home app is
important for latency as we don't have any kind of starting
window/splash screen when pressing the home app to hide any latency.

Memory impact:

Pinning dex/vdex:

In practical scenarios, this should be < 500kb.
The home app is usually profile-speed compiled, for which the
resulting dex/vdex files are about 2 mb. However, during regular
use, at least 1.5 MB of it is referenced in memory. This makes
sense: By definition profile-speed only compiles the things that
is usually frequently executed during regular execution.

Pinning apk:
With Launcher 3 in practical scenarios this should be about 3.7 MB,
as the APK is about 5.7 MB but 2 MB are usually referenced in any
case.

Bug: 111132016
Bug: 78585335
Test: Inspect "adb shell dumpsys pinner" after boot.
Test: Check for pinned files after updating camera/home.
Test: Check for pinned files after user switch with different
default apps.
Test: Check for pinned files after bg-dexopt.
Test: Check for pinned files after bg-dexopt + kill pid.

Change-Id: I6cdbc06d089efeb1c72a51216879ba0573502009