Created attachment 8616145 [details] profile.json After the page loads on treeherder.mozilla.org, I started the profiler in FirefoxDeveloperEdition. Then I just scrolled up and down on the page. The frame rate dropped to below 20 for a good portion of that. Looking at the profile, 93% of that is in "Graphics". Profile attached. Seems like this might be a good candidate for a test bed for Firefox speed improvements. I'm on a mid-2012 Macbook Pro with 16GB RAM, fwiw.
Summary: Scrolling in Treeherder scrolling drops frame rate → Scrolling in Treeherder drops frame rate drastically
Based on comment #0, lobbing this over to Milan to triage for gfx. :-)
Component: General → Graphics
Product: Firefox → Core
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