[NOT FOR LANDING] Patch for experiments: V8

src/global-handles.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/global-handles.h"
 
 #include "src/api.h"
 #include "src/cancelable-task.h"
 #include "src/objects-inl.h"
 #include "src/v8.h"
@@ skipping 481 matching lines @@
 
   bool done() const { return block_ == NULL; }
 
   Node* node() const {
     DCHECK(!done());
     return block_->node_at(index_);
   }
 
   void Advance() {
     DCHECK(!done());
+    __builtin_prefetch(block_->next_used());
     if (++index_ < NodeBlock::kSize) return;
     index_ = 0;
     block_ = block_->next_used();
   }
 
  private:
   NodeBlock* block_;
   int index_;
 
   DISALLOW_COPY_AND_ASSIGN(NodeIterator);
@@ skipping 958 matching lines @@
   blocks_[block][offset] = object;
   if (isolate->heap()->InNewSpace(object)) {
     new_space_indices_.Add(size_);
   }
   *index = size_++;
 }
 
 
 }  // namespace internal
 }  // namespace v8