Find attached TB 78.0b3 startup performance with a blank profile (no email or calendar account setup)... Also available here: https://share.firefox.dev/3dDyJ01 Steps to reproduce: - Open Thunderbird, setup a blank user profile, Quit TB - Open command prompt - set MOZ_PROFILER_STARTUP=1 - set MOZ_PROFILER_SHUTDOWN=c:\temp\profile.json - run "c:\Program Files\Mozilla Thunderbird\thunderbird.exe" - let TB start till main UI visible - go to TB menu > Exit - wait few minutes for performance report c:\temp\profile.json to be generated Possible culprit: **MessageLoop::Run** xul.dll This selected call node Running Time: **22,177ms (76%)**
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Find attached TB 78.0b3 startup performance with a blank profile (no email or calendar account setup)... Also available here: https://share.firefox.dev/3dDyJ01 Steps to reproduce: - Open Thunderbird, setup a blank user profile, Quit TB - Open command prompt - set MOZ_PROFILER_STARTUP=1 (source: https://developer.mozilla.org/en-US/docs/Mozilla/Performance/Profiling_with_the_Built-in_Profiler#Profiling_Firefox_Startup) - set MOZ_PROFILER_SHUTDOWN=c:\temp\profile.json - run "c:\Program Files\Mozilla Thunderbird\thunderbird.exe" - let TB start till main UI visible - go to TB menu > Exit - wait few minutes for performance report c:\temp\profile.json to be generated Possible culprit: **MessageLoop::Run** xul.dll This selected call node Running Time: **22,177ms (76%)**