Open Bug 1807070 Opened 3 years ago Updated 3 years ago

[Snap] nsIShellService.isDefaultBrowser is slow and called 3 times during startup

Categories

(Core :: Widget: Gtk, defect, P3)

Product:
Core
Component:
Widget: Gtk
Platform:
Desktop
Linux
Type:
defect

Tracking

()

Project Flags:
Performance Impact low

People

(Reporter: florian, Unassigned)

References

(Blocks 1 open bug)

Details

(Keywords: perf, perf:startup, reproducible)

Here is a startup profile https://share.firefox.dev/3WEiAyp where we see that nsIShellService.isDefaultBrowser is called 3 times during startup, and is pretty slow. It blocks the main thread while it launches another process.
Could we cache the result? Could we launch this process off main thread earlier during startup and keep the information for when we do need it on the main thread? Do the callers really need this information?

The child process is fired when running in Snap sandbox so it's not general Linux issue.

Blocks: snap
Priority: -- → P3

Here we call it:
https://searchfox.org/mozilla-central/rev/0907529ff72c456ddb47839f5f7ba16291f28dce/browser/components/shell/nsGNOMEShellService.cpp#179

Summary: nsIShellService.isDefaultBrowser is slow and called 3 times during startup → [Snap] nsIShellService.isDefaultBrowser is slow and called 3 times during startup
Performance Impact: --- → ?
Performance Impact: ? → low
Keywords: reproducible
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