tests/mozilla/js1_5/Array/regress-101964.js

   1 /*
   2 * The contents of this file are subject to the Netscape Public
   3 * License Version 1.1 (the "License"); you may not use this file
   4 * except in compliance with the License. You may obtain a copy of
   5 * the License at http://www.mozilla.org/NPL/
   6 *
   7 * Software distributed under the License is distributed on an "AS
   8 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
   9 * implied. See the License for the specific language governing
  10 * rights and limitations under the License.
  11 *
  12 * The Original Code is mozilla.org code.
  13 *
  14 * The Initial Developer of the Original Code is Netscape
  15 * Communications Corporation.  Portions created by Netscape are
  16 * Copyright (C) 1998 Netscape Communications Corporation.
  17 * All Rights Reserved.
  18 *
  19 * Contributor(s): pschwartau@netscape.com
  20 * Date: 27 September 2001
  21 *
  22 * SUMMARY: Performance: truncating even very large arrays should be fast!
  23 * See http://bugzilla.mozilla.org/show_bug.cgi?id=101964
  24 *
  25 * Adjust this testcase if necessary. The FAST constant defines
  26 * an upper bound in milliseconds for any truncation to take.
  27 */
  28 //-----------------------------------------------------------------------------
  29 var UBound = 0;
  30 var bug = 101964;
  31 var summary = 'Performance: truncating even very large arrays should be fast!';
  32 var BIG = 10000000;
  33 var LITTLE = 10;
  34 var FAST = 50; // array truncation should be 50 ms or less to pass the test
  35 var MSG_FAST = 'Truncation took less than ' + FAST + ' ms';
  36 var MSG_SLOW = 'Truncation took ';
  37 var MSG_MS = ' ms';
  38 var status = '';
  39 var statusitems = [];
  40 var actual = '';
  41 var actualvalues = [];
  42 var expect= '';
  43 var expectedvalues = [];
  44
  45
  46
  47 status = inSection(1);
  48 var arr = Array(BIG);
  49 var start = new Date();
  50 arr.length = LITTLE;
  51 actual = elapsedTime(start);
  52 expect = FAST;
  53 addThis();
  54
  55
  56
  57 //-----------------------------------------------------------------------------
  58 test();
  59 //-----------------------------------------------------------------------------
  60
  61
  62
  63 function elapsedTime(startTime)
  64 {
  65   return new Date() - startTime;
  66 }
  67
  68
  69 function addThis()
  70 {
  71   statusitems[UBound] = status;
  72   actualvalues[UBound] = isThisFast(actual);
  73   expectedvalues[UBound] = isThisFast(expect);
  74   UBound++;
  75 }
  76
  77
  78 function isThisFast(ms)
  79 {
  80   if (ms <= FAST)
  81     return MSG_FAST;
  82   return MSG_SLOW + ms + MSG_MS;
  83 }
  84
  85
  86 function test()
  87 {
  88   enterFunc ('test');
  89   printBugNumber (bug);
  90   printStatus (summary);
  91
  92   for (var i=0; i<UBound; i++)
  93   {
  94     reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
  95   }
  96
  97   exitFunc ('test');
  98 }