Firefox/Projects/Mobile Startup Shrink: Difference between revisions

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* [[Firefox/Projects/Startup_Time_Improvements|Startup Performance]]: Somewhat recent startup time tracking project
* [[Firefox/Projects/Startup_Time_Improvements|Startup Performance]]: Somewhat recent startup time tracking project
* [http://blog.mozilla.com/tglek/2011/05/13/firefox-telemetry/ Taras's telemetry blog post]
* [http://blog.mozilla.com/tglek/2011/05/13/firefox-telemetry/ Taras's telemetry blog post]
== Basic startup stats in your console ==
Enable the preference:
devtools.errorconsole.enabled
You will see something like
[timing] main: 488ms              # When XRE_Main is called. Everything before this is
                                    # loading libxul, static initializers, etc.
[timing] firstPaint: 1447ms        # The first paint to the screen (most important one!)
[timing] sessionRestored: 1178ms
These numbers are all measured from startup. In this example, the first paint is 1447 ms from startup, not from main.

Revision as of 22:06, 20 July 2011

For mobile Firefox, a very important user flow is when a user wants to quickly check a webpage from another app (e.g. email, twitter). Since Android very frequently swaps Firefox out when it is hidden, it is imperative that we start quickly. Our single-minded goal is instantaneous startup!

Meetings

A meeting is scheduled for July 21 2011 at 1PM PDT.


  • Dial-in: Audio-only conference# 8604
    • People with Mozilla phones or softphones please dial x4000 Conf# 8604
    • US/Toll-free: +1 800 707 2533, (pin 4000) Conf# 8604
    • US/California/Mountain View: +1 650 903 0800, x4000 Conf# 8604
    • US/California/San Francisco: +1 415 762 5700, x4000 Conf# 8604
    • US/Oregon/Portland: +1 971 544 8000, x4000 Conf# 8604
    • CA/British Columbia/Vancouver: +1 778 785 1540, x4000 Conf# 8604
    • CA/Ontario/Toronto: +1 416 848 3114, x4000 Conf# 8604
    • UK/London: +44 (0)207 855 3000, x4000 Conf# 8604
    • FR/Paris: +33 1 84 88 37 37, x4000 Conf# 8604
    • Gmail Chat (requires Flash and the Google Talk plugin): paste +1 650 903 0800 into the Gmail Chat box that doesn't look like it accepts phone numbers
    • SkypeOut is free if you use the 800 number
  • IRC: #startup
  • Etherpad: http://etherpad.mozilla.com:9000/startupshrink

The agenda:

  • Decide on a way to track progress on Bugzilla.
  • What are our best profiling tools on Android?
    • Telemetry (even using it locally) can be useful to measure progress
      • about:telemetry viewing current broken
    • tMain, tFirstPaint, tSessionRestored
      • devtools.errorconsole.enabled
    • oprofile?
  • What are the high priority bugs we need to fix?
  • Assign bugs and get things done!

Resources

Basic startup stats in your console

Enable the preference: 

devtools.errorconsole.enabled

You will see something like 

[timing] main: 488ms               # When XRE_Main is called. Everything before this is 
                                   # loading libxul, static initializers, etc.
[timing] firstPaint: 1447ms        # The first paint to the screen (most important one!)
[timing] sessionRestored: 1178ms

These numbers are all measured from startup. In this example, the first paint is 1447 ms from startup, not from main.

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