1 /*
   2  * Copyright (c) 2010, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /**
  25  * Simple benchmark to measure charCodeAt specialized method performance
  26  */
  27 
  28 var str = "sghjkdsfkjghsdfjkfkjdfkjdfjkdfjkfdjkfdkfldjfhdfpkjdhafgksdjfgldfgjldfkjgdlfjgldkfjgkldfj";
  29 var RESULT1 = 9187;
  30 var RESULT2 = 1496;
  31 
  32 function f() {
  33     var len = str.length;
  34     var c = 0;
  35     for (var i = 0; i < len; i++) {
  36         c += str.charCodeAt(i);
  37     }
  38     return c;
  39 }
  40 
  41 function bench(res) {
  42     var d = new Date;
  43     var sum = 0;
  44     for (var i = 0; i < 1e6; i++) {
  45         sum |= f();
  46     }
  47     if (sum == res) {
  48         print("Verified OK"); 
  49     } else {
  50         print("Verification failed " + sum + " should be " + res);
  51     }
  52     print((new Date - d) + " ms");
  53 }
  54 
  55 bench(RESULT1);
  56 
  57 print("Replacing charCodeAt... ");
  58 
  59 String.prototype.charCodeAt = function() { return 17; }
  60 
  61 bench(RESULT2);
  62 
  63 print("Done");