Don't unlink evacuation candidates before sweeping, move them to the end of their list of pages.

src/mark-compact.h

 // Copyright 2012 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.
 
 #ifndef V8_MARK_COMPACT_H_
 #define V8_MARK_COMPACT_H_
 
 #include "compiler-intrinsics.h"
 #include "spaces.h"
 
@@ skipping 686 matching lines @@
   class SweeperTask;
 
   explicit MarkCompactCollector(Heap* heap);
   ~MarkCompactCollector();
 
   bool MarkInvalidatedCode();
   bool WillBeDeoptimized(Code* code);
   void RemoveDeadInvalidatedCode();
   void ProcessInvalidatedCode(ObjectVisitor* visitor);
 
-  void UnlinkEvacuationCandidates();
-  void ReleaseEvacuationCandidates();
-
   void StartSweeperThreads();
 
 #ifdef DEBUG
   enum CollectorState {
     IDLE,
     PREPARE_GC,
     MARK_LIVE_OBJECTS,
     SWEEP_SPACES,
     ENCODE_FORWARDING_ADDRESSES,
     UPDATE_POINTERS,
@@ skipping 168 matching lines @@
                                            NewSpacePage* p);
 
   void EvacuateNewSpace();
 
   void EvacuateLiveObjectsFromPage(Page* p);
 
   void EvacuatePages();
 
   void EvacuateNewSpaceAndCandidates();
 
+  void ReleaseEvacuationCandidates();
+
+  // Moves the pages of the evacuation_candidates_ list to the end of their
+  // corresponding space pages list.
+  void MoveEvacuationCandidatesToEndOfPagesList();
+
   void SweepSpace(PagedSpace* space, SweeperType sweeper);
 
   // Finalizes the parallel sweeping phase. Marks all the pages that were
   // swept in parallel.
   void ParallelSweepSpacesComplete();
 
   void ParallelSweepSpaceComplete(PagedSpace* space);
 
 #ifdef DEBUG
   friend class MarkObjectVisitor;
@@ skipping 77 matching lines @@
  private:
   MarkCompactCollector* collector_;
 };
 
 
 const char* AllocationSpaceName(AllocationSpace space);
 
 } }  // namespace v8::internal
 
 #endif  // V8_MARK_COMPACT_H_