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");