Testcase that generates large number of webrtc elements take 4:45 minutes around CC if you reload it in the background
Categories
(Core :: Audio/Video: Playback, defect)
Tracking
()
People
(Reporter: mayankleoboy1, Unassigned)
References
Details
Attachments
(2 files)
Open the attached testcase
Input 250000 in the box and click on generate
Wait for the element to generate. We do pretty good here compared to Chrome
Now reload the page using the reload button on the browser toolbar
Profile: https://share.firefox.dev/40wxOJn (4:45 minutes)
Chrome doesnt generate these many elements. But on a smaller testcase (50000), the reload speed is basically instant for Chrome, whereas it takes 13 seconds for us.
So we generate the elements faster, but take longer to reload the page. Make what you will of this.
Maybe there is something to improve here?
This is an artificial testcase that I created with chatgpt. Feel free to WONTFIX/INVALID.
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Reporter | |
Comment 1•22 days ago
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Comment 2•18 days ago
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Wow, that's actually rendering really smooth once the dust has settled. It seems like main thread is what is crumbling.
Out of your 4m45s about 4m30s is a single CC's ForgetSkippable.
If reload is fast in Chrome maybe it's because they fire up a new content process? (I don't know if they do, but that would explain not needing to wait for a final CC).
Doesn't seem like a webrtc issue, so moving to the CC component in case there is something we could do there. After all, it's an extremely artificial test case.
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Comment 4•18 days ago
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(In reply to Andreas Pehrson [:pehrsons] from comment #2)
Out of your 4m45s about 4m30s is a single CC's ForgetSkippable.
The relevant thing here is not the ForgetSkippable, it is the ~HTMLMediaElement. We're just destroying a bunch of garbage media elements.
That being said, I don't think we care about performance in a background tab, and it does appear to be the same problem as would be addressed by bug 1944426 .
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Updated•18 days ago
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Reporter | |
Comment 6•10 days ago
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This is what i get now: https://share.firefox.dev/4jMOTaL
Description
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