We can use CopiedSpace for their backing stores instead of malloc.
Created attachment 229832 [details] Patch
This neutral on the JS benchmarks we track.
This is a 1.5% speedup on dromaeo.
(In reply to comment #3) > This is a 1.5% speedup on dromaeo. (See http://dromaeo.com/?id=220240,220241)
Comment on attachment 229832 [details] Patch Clearing flags on attachment: 229832 Committed r167641: <http://trac.webkit.org/changeset/167641>
All reviewed patches have been landed. Closing bug.