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diff --git a/Source/JavaScriptCore/tests/mozilla/js1_5/Array/regress-101964.js b/Source/JavaScriptCore/tests/mozilla/js1_5/Array/regress-101964.js
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+/*
+* The contents of this file are subject to the Netscape Public
+* License Version 1.1 (the "License"); you may not use this file
+* except in compliance with the License. You may obtain a copy of
+* the License at http://www.mozilla.org/NPL/
+*
+* Software distributed under the License is distributed on an "AS
+* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+* implied. See the License for the specific language governing
+* rights and limitations under the License.
+*
+* The Original Code is mozilla.org code.
+*
+* The Initial Developer of the Original Code is Netscape
+* Communications Corporation.  Portions created by Netscape are
+* Copyright (C) 1998 Netscape Communications Corporation.
+* All Rights Reserved.
+*
+* Contributor(s): pschwartau@netscape.com
+* Date: 27 September 2001
+*
+* SUMMARY: Performance: truncating even very large arrays should be fast!
+* See http://bugzilla.mozilla.org/show_bug.cgi?id=101964
+*
+* Adjust this testcase if necessary. The FAST constant defines
+* an upper bound in milliseconds for any truncation to take.
+*/
+//-----------------------------------------------------------------------------
+var UBound = 0;
+var bug = 101964;
+var summary = 'Performance: truncating even very large arrays should be fast!';
+var BIG = 10000000;
+var LITTLE = 10;
+var FAST = 50; // array truncation should be 50 ms or less to pass the test
+var MSG_FAST = 'Truncation took less than ' + FAST + ' ms';
+var MSG_SLOW = 'Truncation took ';
+var MSG_MS = ' ms';
+var status = '';
+var statusitems = [];
+var actual = '';
+var actualvalues = [];
+var expect= '';
+var expectedvalues = [];
+
+
+
+status = inSection(1);
+var arr = Array(BIG);
+var start = new Date();
+arr.length = LITTLE;
+actual = elapsedTime(start);
+expect = FAST;
+addThis();
+
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+
+
+function elapsedTime(startTime)
+{
+  return new Date() - startTime;
+}
+
+
+function addThis()
+{
+  statusitems[UBound] = status;
+  actualvalues[UBound] = isThisFast(actual);
+  expectedvalues[UBound] = isThisFast(expect);
+  UBound++;
+}
+
+
+function isThisFast(ms)
+{
+  if (ms <= FAST)
+    return MSG_FAST;
+  return MSG_SLOW + ms + MSG_MS;
+}
+
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber (bug);
+  printStatus (summary);
+
+  for (var i=0; i<UBound; i++)
+  {
+    reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
+  }
+
+  exitFunc ('test');
+}