Closed Bug 1503490 Opened 5 years ago Closed 5 years ago

6.14 - 10.12% sessionrestore_no_auto_restore (linux64, linux64-qr, windows10-64, windows10-64-qr, windows7-32) regression on push 4eaa5f13d23184e6f8b2c22d4cbe31e98f5b630d (Mon Oct 29 2018)


(Testing :: Talos, defect)

Version 3
Not set


(Not tracked)



(Reporter: igoldan, Unassigned)



(Keywords: perf, regression, talos-regression)

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.


 10%  sessionrestore_no_auto_restore windows10-64 pgo e10s stylo        338.96 -> 373.25
  8%  sessionrestore_no_auto_restore windows7-32 pgo e10s stylo         340.92 -> 369.58
  8%  sessionrestore_no_auto_restore windows10-64 opt e10s stylo        367.75 -> 397.00
  8%  sessionrestore_no_auto_restore windows7-32 opt e10s stylo         366.29 -> 394.25
  7%  sessionrestore_no_auto_restore windows10-64-qr opt e10s stylo     380.46 -> 406.00
  6%  sessionrestore_no_auto_restore linux64 pgo e10s stylo             390.33 -> 415.25
  6%  sessionrestore_no_auto_restore linux64-qr opt e10s stylo          893.25 -> 948.08

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 Talos jobs in a pushlog format.

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

For information on reproducing and debugging the regression, either on try or locally, 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 → Talos
:aswan Unless there's something fishy with this new baseline, I want to mark this as WONTFIX.
Flags: needinfo?(aswan)
To be honest, I don't really understand this, the patch in bug 1495638 should not have affected how this test is measured.

Something is suspicious with the test generally though, baseline measurements for sessionrestore_no_auto_restore are higher than vanilla sessionrestore measurements, which makes no sense.

In any case, I agree with marking it WONTFIX.
Flags: needinfo?(aswan)
See Also: → 1503796
See Also: → 1504133
Closed: 5 years ago
Resolution: --- → WONTFIX
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