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");