author | ihse |
Mon, 14 May 2018 22:09:08 +0200 | |
branch | ihse-jdk-library-branch |
changeset 56547 | 3b9f0b44c57b |
parent 47216 | 71c04702a3d5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2010, 2014, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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|
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/** |
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* Simple benchmark to measure charCodeAt specialized method performance |
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*/ |
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|
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var str = "sghjkdsfkjghsdfjkfkjdfkjdfjkdfjkfdjkfdkfldjfhdfpkjdhafgksdjfgldfgjldfkjgdlfjgldkfjgkldfj"; |
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var RESULT1 = 9187; |
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var RESULT2 = 1496; |
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function f() { |
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var len = str.length; |
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var c = 0; |
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for (var i = 0; i < len; i++) { |
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c += str.charCodeAt(i); |
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} |
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return c; |
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} |
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function bench(res) { |
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var d = new Date; |
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var sum = 0; |
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for (var i = 0; i < 1e6; i++) { |
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sum |= f(); |
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} |
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if (sum == res) { |
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print("Verified OK"); |
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} else { |
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print("Verification failed " + sum + " should be " + res); |
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} |
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print((new Date - d) + " ms"); |
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} |
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bench(RESULT1); |
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print("Replacing charCodeAt... "); |
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String.prototype.charCodeAt = function() { return 17; } |
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bench(RESULT2); |
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print("Done"); |