1901375 - Debugging web JavaScript on firefox is lagging and takes up a lot of memory

Status: UNCONFIRMED

(DevTools :: Debugger, defect)

Description

[Yinsel]

Attachment: PixPin_2024-06-08_23-28-37.png

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36 Edg/125.0.0.0

Steps to reproduce:

Debugging web JavaScript on firefox

Actual results:

Large memory usage and sluggish browsing of JavaScript code.
In Chrome browser, there will be no lag and the memory usage is also smaller than that of Firefox.

Expected results:

Small memory usage and smooth browsing of JavaScript code

Comment 1

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

The Bugbug bot thinks this bug should belong to the 'Core::Performance' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Bas Schouten (:bas.schouten)]

The Performance Impact Calculator has determined this bug's performance impact to be low. If you'd like to request re-triage, you can reset the Performance Impact flag to "?" or needinfo the triage sheriff.

Platforms: Windows
Impact on browser: Causes noticeable jank
Configuration: Rare
Resource impact: Some

Comment 3

[Julian Descottes [:jdescottes]]

Looking at the screenshot, the current work on Bug 1907794 might help.

Yinsel: can you share a test page where you reproduce the issue?