1552230 - Page freezes attempting to highlight large JSON blob resulting in slow-script notification

Status: RESOLVED DUPLICATE of bug 1546877

(bugzilla.mozilla.org :: General, defect)

Description

[Logan Smyth [:loganfsmyth]]

Attachment: Screen Shot 2019-05-16 at 9.11.00 AM.png

Loading this page (https://bugzilla.mozilla.org/show_bug.cgi?id=1209784) will freeze the tab while trying to do syntax highlighting.

Profile here:
https://profiler.firefox.com/public/5a3d943316dea818a79e716fd8aa310d3c2f62af/calltree/?implementation=js&thread=3&v=3

Comment 1

[Logan Smyth [:loganfsmyth]]

I also realize now that because I killed the script with the slow-script dialog, I'm also unable to do anything else on that page, like close the bug, I assume because that stuff hadn't run yet. Perhaps the syntax highlighting should also be moved to run after the rest of the page UI has been initialized?

Comment 2

[Kohei Yoshino [:kohei]]

It will be fixed today.