1 // Copyright 2013 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 // Performance test for overriden methods. Makes sure that default case 29 // is faster (cached) than the general case. 30 31 // Default, cached. 32 var startTime = new Date(); 33 for (var i = 0; i < 1000; i++) { 34 'a'.localeCompare('c'); 35 } 36 var endTime = new Date(); 37 var cachedTime = endTime.getTime() - startTime.getTime(); 38 39 // Not cached. 40 startTime = new Date(); 41 for (var i = 0; i < 1000; i++) { 42 'a'.localeCompare('c', 'sr'); 43 } 44 endTime = new Date(); 45 var nonCachedTime = endTime.getTime() - startTime.getTime(); 46 47 // Using collator. Faster than default, but not by much. 48 var collator = Intl.Collator(); 49 startTime = new Date(); 50 for (var i = 0; i < 1000; i++) { 51 collator.compare('a', 'c'); 52 } 53 endTime = new Date(); 54 collatorTime = endTime.getTime() - startTime.getTime(); 55 56 // Difference is within 20%. 57 assertTrue(collatorTime < cachedTime); 58 // Non-cached time is much slower, measured to 12.5 times. 59 assertTrue(cachedTime < nonCachedTime); 60
