[Webkit-unassigned] [Bug 14771] Unbounded memory growth in KJS::UString when repeatedly slicing and prepending/appending

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=14771





------- Comment #12 from john at johnmoe.com  2007-08-13 00:55 PDT -------
It bothers me a bit that there are other quite similar chunks of Javascript
that should not use enormous amounts, but currently will.  For example:

var lastChars = new Array();
for (var i = 0; i < 10000; i++) {
   var s = "x";
   for (var j = 0; j < 19; j++) {
      s += s;
   }
   lastChars[i] = s.slice(s.length-1,s.length);
}

This wouldn't have to ever use more than about 272 thousand chars, but will end
up using over 2.6 billion chars.

Is it worth fixing only one of several ways to cause this UString unbounded and
unused memory problem?


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