1899003 - Developer tools network panel hangs when switching to it with several thousand requests logged

Status: RESOLVED DUPLICATE of bug 1880744

(DevTools :: Netmonitor, defect)

Description

[Eddie Carswell]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0

Steps to reproduce:

1. Open developer tools console tab
2. Generate a few thousand XHR or fetch requests
3. Switch to the network request tab (unfiltered)
4. Observe the hang.

Actual results:

The entire browser becomes unresponsive for a minute or more. This appears to only happen when there are thousands of network requests to be shown. If there are only several hundred, or if the view is filtered to a smaller number, it does not hang.

I can start in the network tab while these requests are being generated and switch away just fine. Then it hangs when I switch back. It appears that this view gets generated (redrawn?) when switching between devtools tabs. Perhaps it should be preserved when switching tabs?

Expected results:

The browser should not become unresponsive because of a devtools hang.

The network panel should not hang regardless of the number of requests to display.

Comment 1

[Eddie Carswell]

Firefox Nightly 128.0a1 (2024-05-24) (64-bit)
Fedora 40 KDE Plasma 6 (Wayland)

Comment 2

[Julian Descottes [:jdescottes]]

Thanks, that's a known issue with uncapped requests in the netmonitor.

Honza, can you find the duplicate bug? Thanks