Introduce a lookup cache class in the runtime system and use it for...

src/heap.cc

Index: src/heap.cc
===================================================================
--- src/heap.cc	(revision 556)
+++ src/heap.cc	(working copy)
@@ -421,6 +421,7 @@
 
 
 void Heap::MarkCompactPrologue() {
+  ClearKeyedLookupCache();
   CompilationCache::MarkCompactPrologue();
   RegExpImpl::OldSpaceCollectionPrologue();
   Top::MarkCompactPrologue();
@@ -1195,6 +1196,9 @@
   if (obj->IsFailure()) return false;
   natives_source_cache_ = FixedArray::cast(obj);
 
+  // Initialize keyed lookup cache.

[bak, 2008/10/23 06:08:11]

Use ClearKeyedLookupCache();

+  keyed_lookup_cache_ = undefined_value();
+
   // Initialize compilation cache.
   CompilationCache::Clear();