CharacterClassConstructor::charClass() gets a little hot (1.2%) when loading twitter feeds, and we can avoid the copy altogether by using Vector::swap().
Created attachment 120512 [details] Proposed patch
Comment on attachment 120512 [details] Proposed patch Attachment 120512 [details] did not pass chromium-ews (chromium-xvfb): Output: http://queues.webkit.org/results/11027710 New failing tests: http/tests/inspector/resource-tree/resource-tree-document-url.html
Committed r103672: <http://trac.webkit.org/changeset/103672>