A large part of that is in transition handling, which is covered under bug 1844466. But if you subtract out `Gecko_UpdateAnimations`, we're still 1.3x slower: Firefox: https://share.firefox.dev/3EgRGp8 8663 samples Chrome: https://share.firefox.dev/3sw5nho 6469 samples Closing the gap on just this part would improve Firefox's overall score on NewsSite-Nuxt by 4.3%.
Bug 1850809 Comment 1 Edit History
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A large part of that is in transition handling, which is covered under bug 1850812. But if you subtract out `Gecko_UpdateAnimations`, we're still 1.3x slower: Firefox: https://share.firefox.dev/3EgRGp8 8663 samples Chrome: https://share.firefox.dev/3sw5nho 6469 samples Closing the gap on just this part would improve Firefox's overall score on NewsSite-Nuxt by 4.3%.