Open Bug 1633925 Opened 6 months ago Updated 6 months ago

Defer writes to preferences database until after startup


(Core :: Preferences: Backend, enhancement)





(Reporter: dthayer, Unassigned)


(Depends on 1 open bug, Blocks 1 open bug)


(Whiteboard: [fxperf:p2])

I'm working my way through a profile of a cold Firefox startup taken via Procmon right now, and I noticed three WriteFiles before startup finished via PWRunnable. These are on a background thread pool, but cold startup on spinny disks is generally heavily IO bound, so regardless of where the IO happens it's a problem. Can we defer these until after startup, or is there a material risk of doing so in the event of, say, a startup crash? I feel like if we're setting a pref during startup where it's mission critical that we don't crash before we write it to disk, then that's a problem in itself.

See Also: → 1633930
Depends on: 1637024
Whiteboard: [fxperf] → [fxperf:p2]
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