[Webkit-unassigned] [Bug 6998] New: Very poor performance of setTimeout function

bugzilla-daemon at opendarwin.org bugzilla-daemon at opendarwin.org
Wed Feb 1 01:51:31 PST 2006


           Summary: Very poor performance of setTimeout function
           Product: WebKit
           Version: 420+ (nightly)
          Platform: Macintosh
        OS/Version: Windows XP
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: JavaScript
        AssignedTo: webkit-unassigned at opendarwin.org
        ReportedBy: sjoerd at backbase.com

The following code shows a simple loop which uses the setTimeout function to
call the same function again, but without the performance drain of a
while(true) loop.

function testTimeout() {

This works perfectly in Internet Explorer, Firefox and Opera. Taking almost 0%
CPU-time. But Safari / Webkit takes 100% of CPU-time... This is a very serious
performance problem. With setTimeout on 1 ms, it takes 25% which is still

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