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

src/heap.cc

 // Copyright 2006-2008 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 403 matching lines @@
 
   gc_state_ = NOT_IN_GC;
 
   Shrink();
 
   Counters::objs_since_last_full.Set(0);
 }
 
 
 void Heap::MarkCompactPrologue() {
+  ClearKeyedLookupCache();
   CompilationCache::MarkCompactPrologue();
   RegExpImpl::OldSpaceCollectionPrologue();
   Top::MarkCompactPrologue();
   ThreadManager::MarkCompactPrologue();
 }
 
 
 void Heap::MarkCompactEpilogue() {
   Top::MarkCompactEpilogue();
   ThreadManager::MarkCompactEpilogue();
@@ skipping 754 matching lines @@
   // Allocate cache for single character strings.
   obj = AllocateFixedArray(String::kMaxAsciiCharCode+1);
   if (obj->IsFailure()) return false;
   single_character_string_cache_ = FixedArray::cast(obj);
 
   // Allocate cache for external strings pointing to native source code.
   obj = AllocateFixedArray(Natives::GetBuiltinsCount());
   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();
 
   return true;
 }
 
 
 static inline int double_get_hash(double d) {
   DoubleRepresentation rep(d);
   return ((static_cast<int>(rep.bits) ^ static_cast<int>(rep.bits >> 32)) &
@@ skipping 1957 matching lines @@
 #ifdef DEBUG
 bool Heap::GarbageCollectionGreedyCheck() {
   ASSERT(FLAG_gc_greedy);
   if (Bootstrapper::IsActive()) return true;
   if (disallow_allocation_failure()) return true;
   return CollectGarbage(0, NEW_SPACE);
 }
 #endif
 
 } }  // namespace v8::internal