841962 - [B2G][OTA] Update channel change makes bootup significantly slower

Status: RESOLVED DUPLICATE of bug 842932

(Firefox OS Graveyard :: General, defect)

Description

[Dave Hylands [:dhylands]]

+++ This bug was initially created as a clone of Bug #841041 +++

For this test I was using gaia v1-train and mozilla-inbound just after the patch from 841041 landed.

1 - Flash built image

2 - Create an update (to the same version)
    ./build.sh gecko-update-full

3 - Setup the phone to use the update
    tools/update-tools/test-update.py ${GECKO_OBJDIR}/dist/b2g-update/b2g-gecko-update.mar

4 - Do a Check Now and then do the update

Time from the pressing Install Now until the "based on mozilla technology" splash is about 15 seconds, and about 3 seconds after that the unlock screen appears.

If you change the Update channel

5 - Modify gecko/toolkit/content/UpdateChannel.sh near the end to override the channel:

    channel = "foobar";
    return channel;

6 - rebuild

7 - Do steps 2 thru 4

The time from pressing Install Now until "based on mozilla technology" splash is about 90 seconds.

Once the unlock screen does appear, then the phone appears to be fine (i.e. performance seems similar to before).

Comment 1

[Dave Hylands [:dhylands]]

If I comment out the:

prefSvc.observe(null, "reload-default-prefs", null);

https://mxr.mozilla.org/mozilla-central/source/toolkit/mozapps/update/nsUpdateService.js#2803

then the boot time goes back to normal.

Comment 2

[Andrew Overholt [:overholt]]

I'm putting this to tef? (it was tef+ since it was cloned) so it goes through triage.

Comment 3

[Dave Hylands [:dhylands]]

Once bug 842932 gets fixed, then the bootup goes back to normal speeds.

Comment 4

[Lukas Blakk [:lsblakk] use ?needinfo]

see bug 842932 comment 5

Comment 5

[Dave Hylands [:dhylands]]

Closing this as a dup of bug 842932 since it seems to be fixed by that bug.