Polling is expensive, especially when you're doing it for hundreds of branches. We should use hooks instead.
<rdar://problem/86413065>
Pull-request: https://github.com/WebKit/WebKit/pull/55
Landed https://commits.webkit.org/245242@main (r287045)
Created attachment 447166 [details] Patch for landing
Committed r287054 (245250@main): <https://commits.webkit.org/245250@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 447166 [details].