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Opened 3 years ago

Last modified 3 years ago

#32597 new defect (bug)

mediaelement.js high CPU usage in Firefox

Reported by: afercia Owned by:
Milestone: Awaiting Review Priority: normal
Severity: normal Version:
Component: External Libraries Keywords:
Focuses: Cc:


Noticed by @iseulde, see discussion here: https://wordpress.slack.com/archives/core-editor/p1433862939000659

Also reproduced on my (very old) machine that makes things very evident. Looks like mediaelement.js audio uses a linear gradient animation on the mejs-time-buffering element which triggers a Firefox bug. I remember similiar issues in Firefox reported years ago and probably never fully fixed. Should probably be reported upstream. See screenshot:


Removing that element from the DOM makes the CPU usage go down to 0.

Change History (2)

This ticket was mentioned in Slack in #core-editor by afercia. View the logs.

3 years ago

#2 @iseulde
3 years ago

  • Component changed from General to External Libraries
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