WeakBlock should have both allocation + visitation memory accounting.
Created attachment 270849 [details] Patch
Comment on attachment 270849 [details] Patch Clearing flags on attachment: 270849 Committed r196251: <http://trac.webkit.org/changeset/196251>
All reviewed patches have been landed. Closing bug.
This may have caused a Dromaeo ∋ JavaScript Library Tests ~8% regression on MacBook Air.
Re-opened since this is blocked by bug 154078