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Firefox OS/Performance/Bisecting Regressions (view source)
Revision as of 05:34, 17 April 2014
, 17 April 2014→Bisecting Gecko/Gaia
| Line 177: | Line 177: | ||
<pre> | <pre> | ||
$ git bisect start | $ cd gaia | ||
$ git bisect start 9da1b9c d4655e7 | |||
Bisecting: 33 revisions left to test after this (roughly 5 steps) | |||
[9e90675d3486ad7494e7333fcf2871c8510e4736] Merge pull request #15833 from gitmai/bug-965512-costcontrol-jshint-fix | |||
$ cd .. | |||
</pre> | |||
Git has chosen revision 9e90675 as the next revision of Gaia to test. It is roughly halfway between the regression range revisions. So now, we need to make a build and test it: | |||
<pre> | |||
$ ENABLE_MARIONETTE=1 ./build.sh -j | |||
$ ENABLE_MARIONETTE=1 ./flash.sh | |||
$ adb forward tcp:2828 tcp:2828 | |||
$ b2gperf --delay=10 --iterations=30 Contacts | |||
. | |||
. | |||
. | |||
2014-04-16 22:27:23,370 B2GPerfRunner INFO | Results for Contacts, cold_load_time: median:1315, mean:1332, std: 88, max:1792, min:1262, | |||
all:1342,1792,1309,1293,1303,1302,1291,1290,1298,1311,1313,1331,1319,1316,1346,1354,1315,1320,1341,1324,1361,1318,1350,1262,1326,1300,1310,1296,1308,1321 | |||
</pre> | |||
The median of 1315 means that this revision is bad. Let's tell git that by running git bisect bad: | |||
<pre> | |||
$ cd gaia | |||
$ git bisect bad | |||
Bisecting: 15 revisions left to test after this (roughly 4 steps) | |||
[f7700e69a1bc2fbbabb80bf3aebcc77498a5647a] Bug 951670 - Contacts list edit mode: Update layout | |||
$ cd .. | |||
</pre> | |||
Now we test the next revision, f7700e6: | |||
<pre> | |||
$ ENABLE_MARIONETTE=1 ./build.sh -j | |||
$ ENABLE_MARIONETTE=1 ./flash.sh | |||
$ adb forward tcp:2828 tcp:2828 | |||
$ b2gperf --delay=10 --iterations=30 Contacts | |||
. | |||
. | |||
. | |||
</pre> | |||