Closed Bug 1689695 Opened 2 years ago Closed 1 year ago

Fission visual metrics regression on Mac for Yahoo Mail on older OS/lower-end macs


(Core :: Performance, defect, P2)




Fission Milestone MVP
Tracking Status
firefox92 --- affected


(Reporter: jesup, Assigned: jesup)



(Whiteboard: fission-perf, fission-soft-blocker)

You can see a ~30-45% visualmetric regression for Yahoo Mail on MacOS here:

Blocks: 1689699
Blocks: 1689702
No longer depends on: 1689694
No longer blocks: 1689699, 1689702

Let's target fixing this in M7.

Assignee: nobody → rjesup
Severity: -- → S3
Fission Milestone: ? → M7
Priority: -- → P2

This is tracked as part of Fission, so I don't think tracking this also as a qf bug is particularly useful.

Whiteboard: [qf] fission-perf → fission-perf

The regression here is down from 20-40% to 7-10% with the Non-native Theming landing for mac, and the preallocation delay patch (bug 1694036). There probably are more gains that can be made here.

Randell said Barret is looking into this.

Assignee: rjesup → brennie

We should target getting this regression down to at least 5%.

Randell said he's looking into this instead of Barret.

Assignee: brennie → rjesup

Latest measurements show that this continues to be 8-10% regression on Mac, even with newer HW (Mac Mini R8’s; 6x2 core i7’s). This is within our release criteria targets and is good enough for Beta.
We'll continue looking for performance optimization opportunities for this and moving this to M8 (Release).

Fission Milestone: M7 → M8
Fission Milestone: M8 → MVP

The 8% regression only shows up on older test platform (r7 Mini with 10.14, compared to r8 Mini (hex-core) with 10.15). 10.15/r8 shows a 4-5% regression.

Summary: Fission visual metrics regression on Mac for Yahoo Mail → Fission visual metrics regression on Mac for Yahoo Mail on older OS/lower-end macs

That's for OSX 10.15 (new mac minis, fast). The 10.14 mac minis (old) are the ones that regress.

This bug is a soft blocker for Fission MVP. We'd like to fix it before our Release channel rollout, but we won't delay the rollout waiting for it.

Whiteboard: fission-perf → fission-perf, fission-soft-blocker

Around 7% on 10.14 old macs now. This is good enough

Closed: 1 year ago
Resolution: --- → FIXED
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