Closed Bug 1545015 Opened 5 years ago Closed 5 years ago

2.9 - 3.25% raptor-tp6m-espn-geckoview / raptor-tp6m-espn-geckoview fcp (android-hw-p2-8-0-android-aarch64) regression on push 8eaa269b362fd429c04779eaff8e2e7cd0075ad7 (Tue Apr 9 2019)


(Core :: JavaScript Engine, defect)

Not set



Tracking Status
firefox-esr60 --- unaffected
firefox67 --- unaffected
firefox68 --- disabled
firefox69 --- fixed


(Reporter: igoldan, Assigned: Waldo)




(Keywords: perf, perf-alert, regression)

Raptor 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.


3% raptor-tp6m-espn-geckoview fcp android-hw-p2-8-0-android-aarch64 opt 665.92 -> 687.58
3% raptor-tp6m-espn-geckoview android-hw-p2-8-0-android-aarch64 opt 782.61 -> 805.34

You can find links to graphs and comparison views for each of the above tests at:

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 Raptor jobs in a pushlog format.

To learn more about the regressing test(s) or reproducing them, please see:

*** 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:

Component: General → JavaScript Engine
Product: Testing → Core
Flags: needinfo?(jwalden)

FYI: I'm traveling visiting family Wednesday to Wednesday now. And while I had planned to work remotely for much of this stretch (probably taking a half day here or there), at the airport in the security line I found myself inadvertently laptop-less. I've attempted to see if someone at home could ship it to me, but this is looking less and less likely by the day given I haven't heard back on the text I sent.

So for the moment, I'm betting it's likely I won't be able to look into this till next Thursday. :-(

Back now, looking into the bug 1545015/bug 1545034/bug 1546313 triad that are almost certainly all an algorithmic concern with the column-computation approach. Just so anyone watching knows...

Depends on: 1549758

The regressing patch ended up being backed out, and a fresh approach (bug 1551916) has not received any reports of regressions similar to this.

Closed: 5 years ago
Flags: needinfo?(jwalden)
Resolution: --- → FIXED
Assignee: nobody → jwalden
Target Milestone: --- → mozilla69
Keywords: perf-alert
Has Regression Range: --- → yes
You need to log in before you can comment on or make changes to this bug.