Putting HashMap in a heap block hurts memory use, speed, and code size. We should stop doing that. This bug will cover removing *most* cases where we do it.
Created attachment 429504 [details] Patch
Thanks for the patch. If this patch contains new public API please make sure it follows the guidelines for new WebKit2 GTK+ API. See https://trac.webkit.org/wiki/WebKitGTK/AddingNewWebKit2API
Created attachment 429506 [details] Patch
<rdar://problem/78675956>