[Webkit-unassigned] [Bug 16201] New: Memory usage increases when a javascript including huge array runs

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=16201

           Summary: Memory usage increases when a javascript including huge
                    array runs
           Product: WebKit
           Version: 525+ (Nightly build)
          Platform: PC
        OS/Version: Windows XP
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: gyuque at gmail.com
                CC: gyuque at gmail.com


When a javascript program has a huge array, JavascriptCore allocates a large
amount of memory blocks while script is running. This problem occurs even
though the script doesn't touch the array.

test cases:

http://svn.coderepos.org/share/lang/javascript/junk/safari-memory-test/test.html

http://svn.coderepos.org/share/lang/javascript/junk/safari-memory-test/test2.html

In test2.html, the content of the array is commented out and this problem won't
occur.

These are results on my computer:

OS:  Windows XP Professional SP2
CPU: Pentium4 3.2GHz
RAM: 2GB

---------------------------------------
test.html
(browser)        (at start) -> (at end)

IE7               33252KB   -> 33240KB (   -12KB )
Firefox 2.0.0.9   27156KB   -> 27800KB (  +644KB )
Opera 9.24        27214KB   -> 27204KB (   -10KB )
Safari(wk r28220) 51452KB   -> 70800KB (+19348KB!)
---------------------------------------
test2.html
(browser)        (at start) -> (at end)

IE7               31564KB   -> 31884KB
Firefox 2.0.0.9   25348KB   -> 25812KB
Opera 9.24        26264KB   -> 26236KB
Safari(wk r28220) 49052KB   -> 49132KB
---------------------------------------


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