Add a PerformanceTest for some commong FontFaceSet style update operations
Created attachment 437341 [details] Patch
This benchmark seems to match the document.fonts access pattern we've seen in some popular sites.
Committed r282111 (241409@main): <https://commits.webkit.org/241409@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 437341 [details].
<rdar://problem/82841966>