Bug 17047 - Out of Memory Error with .split("") due to large number of live objects
Summary: Out of Memory Error with .split("") due to large number of live objects
Alias: None
Product: WebKit
Classification: Unclassified
Component: JavaScriptCore (show other bugs)
Version: 528+ (Nightly build)
Hardware: Mac OS X 10.5
: P2 Normal
Assignee: Nobody
URL: http://ejohn.org/files/bugs/split/
Keywords: HasReduction, InRadar
Depends on:
Reported: 2008-01-28 12:31 PST by John Resig
Modified: 2008-12-29 21:58 PST (History)
3 users (show)

See Also:


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Description John Resig 2008-01-28 12:31:15 PST
I've been hitting some weird Out of Memory errors in the latest nightly builds of WebKit, see the attached URL for an example. It only occurs with .split("") and a mix of closures and intervals. Full script below:

var str = "", ret, fn = [];

for ( var i = 0; i < 16384; i++ )
  str += "a";

for ( var i = 16384; i <= 131072; i *= 2 ) (function(i){
    ret = str.split("");

  str += str;

window.onload = function(){
                if ( fn.length )
        }, 13);
Comment 1 Mark Rowe (bdash) 2008-01-28 12:35:55 PST
After loading <http://ejohn.org/files/bugs/split/> the Caches window shows around 800,000 live objects, which is enough to trigger the "Out of Memory" error.  Forcing a collection manually drops this down to around 270,000.  Closing the tab drops back to around 8,000, which shows nothing is actually being leaked.
Comment 2 Mark Rowe (bdash) 2008-01-28 12:38:07 PST
Comment 3 David Kilzer (:ddkilzer) 2008-02-23 13:27:24 PST
Fixed by r30492?