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myworkday.com causes serious performance issues in background tab

NEW
Unassigned

Status

Tech Evangelism
Desktop
a year ago
a year ago

People

(Reporter: kmag, Unassigned)

Tracking

Firefox Tracking Flags

(Not tracked)

Details

(Whiteboard: [needsdiagnosis])

I noticed that my fan was running constantly on a laptop that should have been idle, and that Firefox was pegging an entire core. I opened the profiler and found that the problem was caused by WorkDay, which I had accidentally left open in a background tab:

https://people.mozilla.com/~kmaglione/images/0c87f9740a65fb13.png

Apparently some timer is running almost constantly, and forcing tons reflows in the process.

I closed the tabs before I looked into the details of the profiling data, so I'm not sure what exactly the code in question was doing.
Whiteboard: [needsdiagnosis]
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