Use HashMap::ensure() in DocumentOrderedMap::add() to avoid constructing a MapEntry if the key is already present in the HashMap.
Created attachment 280278 [details] Patch
Comment on attachment 280278 [details] Patch Clearing flags on attachment: 280278 Committed r201579: <http://trac.webkit.org/changeset/201579>
All reviewed patches have been landed. Closing bug.