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My monthly review of Firefox for Android performance measurements. This month’s highlights:

– No significant regressions or improvements found!


This section tracks Perfomatic graphs from graphs.mozilla.org for mozilla-central builds of Firefox for Android, for Talos tests run on Android 4.0 Opt. The test names shown are those used on tbpl. See https://wiki.mozilla.org/Buildbot/Talos for background on Talos.


This test is not currently run on Android 4.0.


Measure of “checkerboarding” during simulation of real user interaction with page. Lower values are better.

Screenshot from 2014-08-03 13:13:44

12 (start of period) – 12 (end of period)

The temporary regression of July 24 was caused by bug 1031107; resolved by bug 1044702.


Panning performance test. Value is square of frame delays (ms greater than 25 ms) encountered while panning. Lower values are better.

50000 (start of period) – 50000 (end of period)


Performance of history and bookmarks’ provider. Reports time (ms) to perform a group of database operations. Lower values are better.

520 (start of period) – 520 (end of period).


An svg-only number that measures SVG rendering performance. About half of the tests are animations or iterations of rendering. This ASAP test (tsvgx) iterates in unlimited frame-rate mode thus reflecting the maximum rendering throughput of each test. The reported value is the page load time, or, for animations/iterations – overall duration the sequence/animation took to complete. Lower values are better.

6300 (start of period) – 6300 (end of period).


Generic page load test. Lower values are better.

940 (start of period) – 940 (end of period).


Startup performance test. Lower values are better.

3600 (start of period) – 3650 (end of period).

Throbber Start / Throbber Stop

These graphs are taken from http://phonedash.mozilla.org.  Browser startup performance is measured on real phones (a variety of popular devices).

Screenshot from 2014-08-03 13:39:26

Screenshot from 2014-08-03 13:45:17

Screenshot from 2014-08-03 13:49:07


These graphs are taken from http://eideticker.mozilla.org. Eideticker is a performance harness that measures user perceived performance of web browsers by video capturing them in action and subsequently running image analysis on the raw result.

More info at: https://wiki.mozilla.org/Project_Eideticker

The Eideticker dashboard is slowly coming back to life, but there are still not enough results to show graphs here. We’ll check back at the end of August.