Chrome is impressively bad at requestAnimationFrame callbacks. They randomly drop below 60hz, but if window isn't focused, *exceed* 60hz
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Replying to @antumbral
Apparently if you have CSS animations active it will randomly drop your rAF framerate to match the (lower) CSS rate. Awesome.
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Replying to @antumbral
If you delete the animated element using dev tools the framerate instantly returns to a near-perfect 60hz.pic.twitter.com/9b9lRaycxH
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Replying to @antumbral
Why yes it's perfectly normal for canvas.drawImage calls to take a million yearspic.twitter.com/xtwqstXlyH
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Replying to @antumbral1 reply 0 retweets 0 likes
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Replying to @slightlylate @ojanvafai and
Is there a profiling tool I can use to identify why the call is so slow?
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Replying to @antumbral @slightlylate and
This doesn't seem to be the css animation/slow composite issue, it's a separate one
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: what does chrome:tracing show?
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Replying to @slightlylate @ojanvafai and
https://bugs.chromium.org/p/chromium/issues/detail?id=641217 … bug filed for css animation issue, repro found
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Replying to @antumbral @slightlylate and
can I count on y'all to inspect the trace & file a bug for it? I don't understand it
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: I looked it over and it's...strange...
Can you take one one with ALL boxes ticked?
/cc @ojanvafai @ElliottZ @Vincent_Scheib
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Replying to @slightlylate @ojanvafai and
here's a trace w/ all boxes, i also attached it to my bug report https://dl.dropboxusercontent.com/u/1643240/trace_granblue-tiamat-hl-all-categories.trace.json.gz …
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