Merge "Optimizing: Reduce arena memory used by GraphChecker." am: 6f51d77 am: 80ec300
am: ad72c5f

* commit 'ad72c5fd73d2f6194d5abdfee3dc3f51b3d331d2':
  Optimizing: Reduce arena memory used by GraphChecker.

Change-Id: I1bb8190b4af810bf68ba8a8e694b82b03f69a861