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

* commit '6f51d7756a9c66007fe7666b19399e1f60ff6092':
  Optimizing: Reduce arena memory used by GraphChecker.

Change-Id: Ibed1731665038d681998b8d31d1cd218e074f5ff