High CPU use on gmail.com due to exzessive window.message usage (blocking other tabs from loading)
Categories
(Core :: Performance, defect)
Tracking
()
People
(Reporter: whimboo, Unassigned)
References
(Blocks 1 open bug)
Details
(Keywords: power)
### Basic information
I've a Gmail tab open in a pinned tab and right now I noticed that it's using up to 80% of CPU for the webcontent process. Also trying to load a Bugzilla page in a different tab seems to be blocked by that given that no process can be seen.
Reloading the Gmail tab fixed the problem.
Performance recording (profile)
Profile URL: https://share.firefox.dev/3vEDBku (sadly not a performance profile but hopefully it contains some useful information)
System configuration:
OS version: MacOS 14.2
GPU model: M1 Pro
Number of cores: 10
Amount of memory (RAM): 32
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Comment 1•8 months ago
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The profile looks terrible! But if it never happens again, I don't think this is actionable. Please reopen if it happens again.
The profile also confirms that the bugzilla request never loaded, but it doesn't contain samples from the network threads so it's not clear what's holding it up.
Description
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