574914 - Slow script dialog, browser freeze

Status: RESOLVED FIXED

(Core :: JavaScript Engine, defect)

Description

[David Anderson [:dvander] - inactive, e-mail if emergency]

Attachment: page that freezes

Reporting this for a user. Firefox freezes for a bit and then shows the slow script dialog. Line of code *might* be:

{var index=0;var match=null;while((match=regex.exec(this.code))!=null)

Maybe YARR will magically save us?

Comment 1

[David Anderson [:dvander] - inactive, e-mail if emergency]

Safari loads instantly. IE8, Opera freeze.

Live URL is: http://www.facepunch.com/showthread.php?t=958779
zipped in case it changes

Comment 2

[Brendan Eich [:brendan]]

What is regexp? (I didn't look, please copy and paste for everyone's sake.)

If it's exponential, the complexity limiter will save us on trunk builds, now.

/be

Comment 3

[David Anderson [:dvander] - inactive, e-mail if emergency]

Possibly /"(?:\.|(\\\")|[^\""\n])*"/g against a wall of ASCII.

JS program appears to be a syntax highlighter, choking on a user who accidentally pasted the contents of a DLL.

Changing relimit pref doesn't help in 3.6.4, if that's a thing.

Comment 4

[Chris Leary [:cdleary] (not checking bugmail)]

Loads instantly in tracemonkey-yarr. lulz.

Comment 5

[Shawn Wilsher :sdwilsh]

This will be fixed by bug 564953 per comment 4 (which is also a beta 4 blocker)