I've used this class to do some basic performance improvements, it seems useful enough to be committed.
<rdar://problem/79689588>
Linking this to https://bugs.webkit.org/show_bug.cgi?id=225616 since that's where I was using it.
Created attachment 432086 [details] Patch
Comment on attachment 432086 [details] Patch r=me
Created attachment 432495 [details] Patch for landing
Committed r279377 (239242@main): <https://commits.webkit.org/239242@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 432495 [details].