am 2bb0b03f: Fix performance regression in arena_palloc().
am 2bb0b03f: Fix performance regression in arena_palloc().

* commit '2bb0b03fd3c2e72d21505db1f813362c6204d18f':
  Fix performance regression in arena_palloc().

AndroidExternal/jemalloc,AndroidExternal/jemalloc,AndroidExternal/jemalloc,AndroidExternal/jemalloc