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9.33 - 78.05% cart / tsvgx (linux64) regression on push 830c06ded9bb474004bbf8aaf9d8f9b44d811147 (Tue May 23 2017)

RESOLVED FIXED in Firefox 55



Address Bar
4 months ago
4 months ago


(Reporter: igoldan, Assigned: mak)


(Blocks: 1 bug, {perf, regression, talos-regression})

Firefox 55
perf, regression, talos-regression
Dependency tree / graph

Firefox Tracking Flags

(firefox-esr52 unaffected, firefox53 unaffected, firefox54 unaffected, firefox55 fixed)


(Whiteboard: [fxsearch])

MozReview Requests


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(1 attachment)

Talos has detected a Firefox performance regression from push:


As author of one of the patches included in that push, we need your help to address this regression.


 78%  cart summary linux64 opt e10s     29.74 -> 52.95
  9%  tsvgx summary linux64 opt e10s    433.44 -> 473.88

You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=6788

On the page above you can see an alert for each affected platform as well as a link to a graph showing the history of scores for this test. There is also a link to a treeherder page showing the Talos jobs in a pushlog format.

To learn more about the regressing test(s), please see: https://wiki.mozilla.org/Buildbot/Talos/Tests

For information on reproducing and debugging the regression, either on try or locally, see: https://wiki.mozilla.org/Buildbot/Talos/Running

*** Please let us know your plans within 3 business days, or the offending patch(es) will be backed out! ***

Our wiki page outlines the common responses and expectations: https://wiki.mozilla.org/Buildbot/Talos/RegressionBugsHandling
Could you confirm this regression? Looks like it only happens on linux64.
Flags: needinfo?(past)
Flags: needinfo?(mak77)

Comment 2

4 months ago
I don't see how our change may cause a regression in tsvgx or cart.

tsvgx loads svg pages, it's unlikely to load those by doing a search in the location bar, right? If this test is affected in any way, sounds like it may be a bogus test.

cart is measuring animation of the customization panel... Again, I can't think of a reason why enabling search suggestions in the location bar may have anything to do with this, unless the test is typing something in the locationbar, that would be dumb.

Though, I have a plausible theory, that these tests are opening new tabs and as a consequence focusing the locationbar and showing the onboarding notification.

I suspect talos doesn't respect prefs_general.js right?
It seems to have a different place for prefs that is:

If so, we should probably add to it
user_pref("browser.urlbar.userMadeSearchSuggestionsChoice", true);
Flags: needinfo?(mak77) → needinfo?(ionut.goldan)
Ionut, add it here:

I assume a try push will prove this quickly!


4 months ago
Assignee: nobody → mak77
Flags: needinfo?(ionut.goldan)
Whiteboard: [fxsearch]

Comment 4

4 months ago
let's see https://treeherder.mozilla.org/#/jobs?repo=try&revision=710af955076416c5e901d965235fc3122d011dd0


4 months ago
Component: Untriaged → Location Bar
Priority: -- → P1
Flags: needinfo?(past)
Didn't see comment 4, and so I also pushed to try: https://treeherder.mozilla.org/#/jobs?repo=try&revision=cadf43431f9f71e78edefce791060e1e49360011

Comment 6

4 months ago
sounds good, feel free to cancel my builds, or just use them as an additional baseline, we have a good number of linux64 builders, and I actually didn't retrigger multiple Talos runs...

Comment 7

4 months ago
I see:
cart summary opt e10s: 29.7
tsvgx summary opt e10s: 431.69
These looks like the previous values... I only have 2 datapoints, Ionut may have more.

Feel free to make/review a patch here, I'm fine with that, I don't have further time for today :(


4 months ago
Assignee: mak77 → ionut.goldan
Ionut, your base revision was prior to this code landing, so the good numbers are sort of false.  Can you push with a recent revision?
Sorry about that miss. Strange how I've picked the wrong changeset... Probably I didn't properly save the hash in clipboard.
I'm pushing the change again.
::mak :jmaher This is the second push: https://treeherder.mozilla.org/#/jobs?repo=try&revision=033e95ec7f8ac23d68f8b815cae3d926251dc96a
Results came in, and this is a comparison, againts the last changeset, before this alerted regression:

None of the cart and tsvgx regressions seem to appear, after calibrating the Talos tests.
:jmaher Can you confirm this so to mark bug 1367351 as invalid?
Flags: needinfo?(jmaher)

Comment 12

4 months ago
(In reply to Ionuț Goldan [:igoldan], Performance Sheriffing from comment #11)
> so to mark bug 1367351 as invalid?

By invalid you mean we should land your patch in central, right? Do you mind attaching it with a proper commit message for review?
(In reply to Marco Bonardo [::mak] from comment #12)

> By invalid you mean we should land your patch in central, right?
> Do you mind attaching it with a proper commit message for review?
  I actually encourage you to do that.

But before doing this, I need to coordinate with Joel.
Comment hidden (mozreview-request)

Comment 15

4 months ago
Comment on attachment 8871197 [details]
Bug 1367351 - Avoid the search suggestions onboarding in Talos tests.

Attachment #8871197 - Flags: review?(jmaher) → review+
thanks for getting this verified on Try Ionut!
Flags: needinfo?(jmaher)

Comment 17

4 months ago
Pushed by jmaher@mozilla.com:
Avoid the search suggestions onboarding in Talos tests. r=jmaher


4 months ago
Assignee: ionut.goldan → mak77


4 months ago
status-firefox53: --- → unaffected
status-firefox54: --- → unaffected
status-firefox55: --- → affected

Comment 18

4 months ago
Last Resolved: 4 months ago
status-firefox55: affected → fixed
Resolution: --- → FIXED
Target Milestone: --- → Firefox 55
status-firefox-esr52: --- → unaffected
here are some improvements related to this:
== Change summary for alert #6858 (as of May 25 2017 08:59 UTC) ==


 32%  cart summary linux64 opt e10s     42.93 -> 29.35
  8%  tsvgx summary linux64 opt e10s    465.22 -> 429.88
  2%  tp5o_webext Main_RSS linux64 opt e10s186,701,394.26 -> 182,171,839.26
  2%  tp5o Main_RSS linux64 opt e10s    179,690,743.71 -> 175,542,737.99

For up to date results, see: https://treeherder.mozilla.org/perf.html#/alerts?id=6858
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