[Webkit-unassigned] [Bug 27149] New: JavaScript runaway script dialog.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=27149

           Summary: JavaScript runaway script dialog.
           Product: WebKit
           Version: 525.x (Safari 3.2)
          Platform: Macintosh
               URL: http://trac.webkit.org/browser/trunk/WebCore/bindings/
                    js/kjs_binding.cpp?rev=14904#L69
        OS/Version: Mac OS X 10.5
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mrithulashan at gmail.com


One of the programming barriers that we web developers are constantly bumping
up against is the dreaded long-running script dialog (the runaway script
dialog). These dialogs are displayed whenever the JavaScript code takes too
long to execute. Safari does not determine slow script by total amount of
statements the engine has executed. Looks like Safari uses script execution
time (5 seconds to be exact) to determine if a a script is slow:

http://trac.webkit.org/browser/trunk/WebCore/bindings/js/kjs_binding.cpp?rev=14904#L69
[ Line # 72 ]

Firefox determines that a script is long-running by timing how long the script
engine has been executing code continuously. The default time is set to 10
seconds and can be altered via about:config. [ Note that the amount of time
modal dialogs, such as alerts, are displayed does not count against the script
engine execution code]. When this execution time has been reached, Firefox
displays the 'unresponsive script' dialog.

In Safari > Sure there is the Disable Runaway JavaScript Timer under > the
Develop menu. But I have thousands of remote users for my application across
the country. Instead of using "script execution time" can it be "total amount
of statements the JavaScript engine has executed?" This should help application
developers who use 'applets' to load them with out the 'slow script' error.
Thanks.

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