Implemented a ContextSlotCache for compiled code.

src/heap.cc

Index: src/heap.cc
===================================================================
--- src/heap.cc	(revision 2226)
+++ src/heap.cc	(working copy)
@@ -501,6 +501,7 @@
   // At any old GC clear the keyed lookup cache to enable collection of unused
   // maps.
   KeyedLookupCache::Clear();
+  ContextSlotCache::Clear();
 
   CompilationCache::MarkCompactPrologue();
 
@@ -1388,6 +1389,9 @@
   // Initialize keyed lookup cache.
   KeyedLookupCache::Clear();
 
+  // Initialize context slot cache.
+  ContextSlotCache::Clear();
+
   // Initialize compilation cache.
   CompilationCache::Clear();
 
@@ -3514,6 +3518,8 @@
 }
 
 
+// ------ KeyedLookupCache ------

[Mads Ager (chromium), 2009/06/22 08:00:18]

We do not have separators like this in the rest of the code.  Could you remove
it (or add in more so it is consistently used)?

+
 int KeyedLookupCache::Hash(Map* map, String* name) {
   // Uses only lower 32 bits if pointers are larger.
   uintptr_t addr_hash =
@@ -3548,8 +3554,10 @@
   for (int index = 0; index < kLength; index++) keys_[index].map = NULL;
 }
 
+
 KeyedLookupCache::Key KeyedLookupCache::keys_[KeyedLookupCache::kLength];
 
+
 int KeyedLookupCache::field_offsets_[KeyedLookupCache::kLength];