1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * - Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 11 * - Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * - Neither the name of Oracle nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 20 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * A micro-benchmark for getters and setters with primitive values, 34 * alternating between ints and doubles. Introduction of primitive 35 * and optimistic user accessors in JDK-8062401 make this faster by 36 * 10x or more by allowing inlining and other optimizations to take place. 37 */ 38 39 var x = { 40 get m() { 41 return this._m; 42 }, 43 set m(v) { 44 this._m = v; 45 }, 46 get n() { 47 return this._n; 48 }, 49 set n(v) { 50 this._n = v; 51 } 52 }; 53 54 55 function bench(v1, v2, result) { 56 var start = Date.now(); 57 x.n = v1; 58 for (var i = 0; i < 1e8; i++) { 59 x.m = v2; 60 if (x.m + x.n !== result) { 61 throw "wrong result"; 62 } 63 } 64 print("done in", Date.now() - start, "millis"); 65 } 66 67 for (var i = 0; i < 10; i++) { 68 bench(i, 4, 4 + i); 69 } 70 71 for (var i = 0; i < 10; i++) { 72 bench(i, 4.5, 4.5 + i); 73 } 74 75 for (var i = 0; i < 10; i++) { 76 bench(i, 5, 5 + i); 77 } 78 79 for (var i = 0; i < 10; i++) { 80 bench(i, 5.5, 5.5 + i); 81 }