[Invalidation Tracking] Trace StyleInvalidator setNeedsStyleRecalc

Source/core/Init.cpp

Index: Source/core/Init.cpp
diff --git a/Source/core/Init.cpp b/Source/core/Init.cpp
index ed6e14159d6f48d1563469833639eb3e8e47be47..c83475b29977a8317983c6eeec0fbc4d9a3599a2 100644
--- a/Source/core/Init.cpp
+++ b/Source/core/Init.cpp
@@ -46,6 +46,8 @@
 #include "core/XLinkNames.h"
 #include "core/XMLNSNames.h"
 #include "core/XMLNames.h"
+#include "core/css/invalidation/DescendantInvalidationSet.h"
+#include "core/css/invalidation/StyleInvalidator.h"
 #include "core/dom/Document.h"
 #include "core/dom/StyleChangeReason.h"
 #include "core/events/EventFactory.h"
@@ -101,6 +103,8 @@ void CoreInitializer::init()
     QualifiedName::init();
     Partitions::init();
     EventTracer::initialize();
+    DescendantInvalidationSet::init(); // Depends on EventTracer::initialize()

[pdr., 2014/10/14 01:36:47]

Are these still needed?

[kouhei (in TOK), 2014/10/14 02:02:10]

Yes. These caches pointers to tracing flag. Accounts for 1-2% of overhead.

[kouhei (in TOK), 2014/10/14 04:18:13]

Discussed offline. I changed these flags to be initialized inside
StyleInvalidator c-tor.

+    StyleInvalidator::init(); // Depends on EventTracer::initialize()
 
     registerEventFactory();