1389590 - Reduce browser.slowStartup.timeThreshold to 20 seconds

Status: VERIFIED FIXED

(Firefox :: General, enhancement)

Description

[Dão Gottwald [:dao]]

+++ This bug was initially created as a clone of Bug #1379245 +++

Some context:
- Bug 848460 reduced this from 60 seconds to 50 and then 45 seconds
- Bug 1015619 reduced it to 40 seconds
- Bug 1298945 made it so that we only show the slow startup notification in old profiles where a reset is likely to help
- Bug 1379245 reduced the threshold to 30 seconds
- The first paint taking >20 seconds affects about 10% of users in 54, but with legacy add-on deprecation and recent efforts to improve startup time, hopefully this share will be smaller in 57? A more conservative step would be 25 seconds (currently amounts to about 8%).

Comment 1

[Dão Gottwald [:dao]]

Attachment: Bug 1389590 - Reduce browser.slowStartup.timeThreshold to 20 seconds.

Review commit: https://reviewboard.mozilla.org/r/167654/diff/#index_header
See other reviews: https://reviewboard.mozilla.org/r/167654/

Comment 2

[Dave Townsend [:mossop]]

10% seems high but I agree that number should drop with the changes you mention. What do nightly numbers look like right now and what is the startup time on the reference hardware?

Comment 3

[Dão Gottwald [:dao]]

(In reply to Dave Townsend [:mossop] from comment #2)
> 10% seems high but I agree that number should drop with the changes you
> mention.

It's not necessarily a bad thing. The more users this can help, the better. We just shouldn't be surprised by how many users might see this.

> What do nightly numbers look like right now

For 9.26% of Nighty 57 users, the first paint happens after 30(!) seconds. Not sure what's going on there. The trend is positive though: https://telemetry.mozilla.org/new-pipeline/evo.html#!aggregates=median&cumulative=0&end_date=2017-08-10&keys=!__none__!__none__&max_channel_version=nightly%252F57&measure=SIMPLE_MEASURES_FIRSTPAINT&min_channel_version=nightly%252F54&processType=*&product=Firefox&sanitize=1&sort_keys=submissions&start_date=2017-08-02&trim=1&use_submission_date=0

> and what is the startup time on the reference hardware?

I don't know, I could check next week at the office.

Comment 4

[Dave Townsend [:mossop]]

Comment on attachment 8896412 [details]
Bug 1389590 - Reduce browser.slowStartup.timeThreshold to 20 seconds.

https://reviewboard.mozilla.org/r/167654/#review173552

Let's do this but keep an eye on telemetry.

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/d1025dcf203f
Reduce browser.slowStartup.timeThreshold to 20 seconds. r=mossop

Comment 6

[Carsten Book [:Tomcat]]

https://hg.mozilla.org/mozilla-central/rev/d1025dcf203f

Comment 7

[Sajedul Islam]

I have reproduced this bug with Nightly 57.0a1 (2017-08-11) on Windows 8.1 , 64 Bit ! 

This bug's fix is Verified with latest Beta 57.0b3 !

Build   ID    20170925150345
User Agent    Mozilla/5.0 (Windows NT 6.3; WOW64; rv:57.0) Gecko/20100101 Firefox/57.0

Comment 8

[Mohammad Maruf Rahman]

I have reproduced this bug with Nightly 57.0a1 (2017-08-11) (64-bit) on Ubuntu 16.04 LTS!

This bug's fix is Verified with latest Beta!

Build   ID    20170925150345
User Agent    Mozilla/5.0 (X11; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0

[bugday-20170927]

Comment 9

[Sajedul Islam]

As par Comment 7 & Comment 8 , I am marking this bug as Verified Fixed !