More aggressive scheduling during early page load seems like a win.
Created attachment 423607 [details] patch
Comment on attachment 423607 [details] patch r=me
Found 1 new test failure: imported/w3c/web-platform-tests/xhr/responsexml-document-properties.htm
Created attachment 423704 [details] patch
Committed r274707: <https://commits.webkit.org/r274707> All reviewed patches have been landed. Closing bug and clearing flags on attachment 423704 [details].
<rdar://problem/75612589>