Avoid use of std::string where we have const char*.
Removing the ClassHelper caused std::string creation for all calls to
Class::GetDescriptor and a significant performance regression. Make the
std::string an out argument so the caller can maintain it and its life time
while allowing GetDescriptor to return the common const char* case.
Don't generate GC maps when compilation is disabled.
Remove other uses of std::string that are occuring on critical paths.
Use the cheaper SkipClass in CompileMethod in CompilerDriver.
Specialize the utf8 as utf16 comparison code for the common shorter byte
encoding.
Force a bit of inlining, remove some UNLIKELYs (they are prone to pessimizing
code), add some LIKELYs.
x86-64 host 1-thread interpret-only of 57 apks:
Before: 29.539s
After: 23.467s
Regular compile:
Before: 1m35.347s
After: 1m20.056s
Bug: 16853450
Change-Id: Ic705ea24784bee24ab80084d06174cbf87d557ad
diff --git a/runtime/base/mutex-inl.h b/runtime/base/mutex-inl.h
index 3e5cdba..f70db35 100644
--- a/runtime/base/mutex-inl.h
+++ b/runtime/base/mutex-inl.h
@@ -51,9 +51,11 @@
blocked_tid_(kLogLockContentions ? blocked_tid : 0),
owner_tid_(kLogLockContentions ? owner_tid : 0),
start_nano_time_(kLogLockContentions ? NanoTime() : 0) {
- std::string msg = StringPrintf("Lock contention on %s (owner tid: %" PRIu64 ")",
- mutex->GetName(), owner_tid);
- ATRACE_BEGIN(msg.c_str());
+ if (ATRACE_ENABLED()) {
+ std::string msg = StringPrintf("Lock contention on %s (owner tid: %" PRIu64 ")",
+ mutex->GetName(), owner_tid);
+ ATRACE_BEGIN(msg.c_str());
+ }
}
~ScopedContentionRecorder() {