Introduce an option to do regular new space growing for a while

src/heap/spaces.cc

 // Copyright 2011 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/v8.h"
 
 #include "src/base/bits.h"
 #include "src/base/platform/platform.h"
 #include "src/full-codegen.h"
 #include "src/heap/mark-compact.h"
@@ skipping 1380 matching lines @@
 
     // We should only get here if someone asks to allocate more
     // than what can be stored in a single page.
     // TODO(gc): Change the limit on new-space allocation to prevent this
     // from happening (all such allocations should go directly to LOSpace).
     return false;
   }
   if (!to_space_.AdvancePage()) {
     // Check if we reached the target capacity yet. If not, try to commit a page
     // and continue.
-    if ((to_space_.TotalCapacity() < to_space_.TargetCapacity()) &&
+    if (grow_to_target_capacity_ &&
+        (to_space_.TotalCapacity() < to_space_.TargetCapacity()) &&
         GrowOnePage()) {
       if (!to_space_.AdvancePage()) {
         // It doesn't make sense that we managed to commit a page, but can't use
         // it.
         CHECK(false);
       }
     } else {
       // Failed to get a new page in to-space.
       return false;
     }
@@ skipping 1754 matching lines @@
     object->ShortPrint();
     PrintF("\n");
   }
   printf(" --------------------------------------\n");
   printf(" Marked: %x, LiveCount: %x\n", mark_size, LiveBytes());
 }
 
 #endif  // DEBUG
 }
 }  // namespace v8::internal