- Disassociate old page size from new allocatable size.

runtime/vm/gc_marker.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/gc_marker.h"
 
 #include <map>
 #include <utility>
 
 #include "vm/allocation.h"
@@ skipping 169 matching lines @@
       // Visit all elements with a key equal to raw_obj.
       ret = delay_set_.equal_range(raw_obj);
       for (DelaySet::iterator it = ret.first; it != ret.second; ++it) {
         it->second->VisitPointers(this);
       }
       delay_set_.erase(ret.first, ret.second);
       raw_obj->ClearWatchedBit();
     }
     marking_stack_->Push(raw_obj);
 
-    // Update the number of used bytes on this page for fast accounting.
-    HeapPage* page = PageSpace::PageFor(raw_obj);
-    page->AddUsed(raw_obj->Size());
-
     // TODO(iposva): Should we mark the classes early?
     MarkObject(raw_class, NULL);
   }
 
   void MarkObject(RawObject* raw_obj, RawObject** p) {
     // Fast exit if the raw object is a Smi.
     if (!raw_obj->IsHeapObject()) return;
 
     // Fast exit if the raw object is marked.
     if (raw_obj->IsMarked()) return;
@@ skipping 205 matching lines @@
   DrainMarkingStack(isolate, &mark);
   IterateWeakReferences(isolate, &mark);
   MarkingWeakVisitor mark_weak;
   IterateWeakRoots(isolate, &mark_weak, invoke_api_callbacks);
   mark.Finalize();
   ProcessPeerReferents(page_space);
   Epilogue(isolate, invoke_api_callbacks);
 }
 
 }  // namespace dart