1943284 - Netmonitor slows down Firefox main process when displaying big data URIs (eg 10MB)

Status: RESOLVED FIXED

(DevTools :: Netmonitor, defect)

Description

[Julian Descottes [:jdescottes]]

Data URIs can potentially be very long and we should check how the netmonitor is handling those.

One example from https://fnafgame.io/fnaf-3 seems to load a 40+ MB data URI, but platform doesn't support it at the moment. Will come up with something more reasonable.

Even with slightly big data URIs (eg 20k), we render them fully in the File/URI cells of the netmonitor, and simply apply an ellipsis. So this might be a big issue with bigger data URIs

Comment 1

[Julian Descottes [:jdescottes]]

Attachment: test_case.html

STRs:

• open test_case.html (generates 10 requests of 10MB data URI content)
• open netmonitor
• reload

ER:
Firefox should remain fast
AR:
All Firefox UI becomes extremely slow

Comment 2

[Julian Descottes [:jdescottes]]

This is purely a UI issue, removing the File and URL columns makes the panel and Firefox UI fast again

Comment 3

[Julian Descottes [:jdescottes]]

Attachment: Bug 1943284 - [devtools] Introduce cap for showing long URLs in netmonitor to avoid issues with big data URIs

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/f75b5b75147b
[devtools] Introduce cap for showing long URLs in netmonitor to avoid issues with big data URIs r=devtools-reviewers,ochameau

Comment 5

[amarc]

https://hg.mozilla.org/mozilla-central/rev/f75b5b75147b