Made iteration of global handles more efficient on scavenges.

src/heap-profiler.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 518 matching lines @@
 const JSObjectsCluster ClustersCoarser::ClusterEqualityConfig::kNoValue;
 const JSObjectsRetainerTreeConfig::Key JSObjectsRetainerTreeConfig::kNoKey;
 const JSObjectsRetainerTreeConfig::Value JSObjectsRetainerTreeConfig::kNoValue =
     NULL;
 
 
 RetainerHeapProfile::RetainerHeapProfile()
     : zscope_(DELETE_ON_EXIT) {
   JSObjectsCluster roots(JSObjectsCluster::ROOTS);
   ReferencesExtractor extractor(roots, this);
-  Heap::IterateRoots(&extractor);
+  Heap::IterateRoots(&extractor, VISIT_ONLY_STRONG);
 }
 
 
 void RetainerHeapProfile::StoreReference(const JSObjectsCluster& cluster,
                                          HeapObject* ref) {
   JSObjectsCluster ref_cluster = Clusterizer::Clusterize(ref);
   if (ref_cluster.is_null()) return;
   JSObjectsRetainerTree::Locator ref_loc;
   if (retainers_tree_.Insert(ref_cluster, &ref_loc)) {
     ref_loc.set_value(new JSObjectsClusterTree());
@@ skipping 135 matching lines @@
   GlobalHandles::MakeWeak(handle.location(),
                           static_cast<void*>(stack.start()),
                           StackWeakReferenceCallback);
 }
 
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 
 } }  // namespace v8::internal