1846824 - Major performance regression (Speedometer) and Drop-down lists are bugging out

Status: RESOLVED WORKSFORME

(Core :: Performance, defect)

Description

[aidilzmtsk]

Attachment: Screenshot from 2023-08-03 00-25-05.png

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/117.0

Steps to reproduce:

Speedometer regression:
Run Speedometer, record summary. (Note first iteration results)

Drop-down lists bugging out:
Click on a drop-down list widget.

Actual results:

Speedometer regression:
Results dropped from 126 (116beta) to 114 (117beta). Iteration 1 shows only 44.28 runs/min
When recording performance, it dropped to 86 (maybe due to performance recording and not related to issue)

Drop-down lists bugging out:
Click on a drop-down list widget. It flashes many times for a bit. Causes lag when showing the list boxes.

Expected results:

Speedometer regression:
No major performance regression

Drop-down lists bugging out:
No flashing and lag when clicking and showing listboxes

Comment 1

[aidilzmtsk]

Attachment: Overall result of speedometer as of Firefox 117.0b2

Comment 2

[aidilzmtsk]

https://share.firefox.dev/3DKubo0

This links to the performance profiler, which was set to Web Developer.

This is my first Mozilla issue, so please tell me if you need more info.

P.S: These issues appeared on 117.0b2. I do not know if this issue affected 117.0b1 as well

Comment 3

[Mayank Bansal]

Hi,

1. can you attach the contents of your about:support on this bug
2. Are you able to do a bisection using https://mozilla.github.io/mozregression/ that will point to the commit/patch that caused the performance regression and the drop-down menu corruption ?

Comment 4

[aidilzmtsk]

Attachment: about:support text

(In reply to Mayank Bansal from comment #3)
> Hi,
> 
> 1. can you attach the contents of your about:support on this bug
> 2. Are you able to do a bisection using https://mozilla.github.io/mozregression/ that will point to the commit/patch that caused the performance regression and the drop-down menu corruption ?

This is my about:support contents

Comment 5

[aidilzmtsk]

(In reply to Mayank Bansal from comment #3)

Hi,

1. can you attach the contents of your about:support on this bug
2. Are you able to do a bisection using https://mozilla.github.io/mozregression/ that will point to the commit/patch that caused the performance regression and the drop-down menu corruption ?

As for mozregression, give me some to find out how to run it on a flatpak

Comment 6

[BugBot [:suhaib / :marco/ :calixte]]

This bug was moved into the Performance component.

:aidilzmtsk, could you make sure the following information is on this bug?

• ✅ For slowness or high CPU usage, capture a profile with http://profiler.firefox.com/, upload it and share the link here.
• For memory usage issues, capture a memory dump from about:memory and attach it to this bug.
• Troubleshooting information: Go to about:support, click "Copy raw data to clipboard", paste it into a file, save it, and attach the file here.

If the requested information is already in the bug, please confirm it is recent.

Thank you.

Comment 7

[aidilzmtsk]

Whatever the performance regression was, it was fixed as of 117.0b4.

Closing issue