60 lines
2.5 KiB
JavaScript
60 lines
2.5 KiB
JavaScript
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// Copyright 2013 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Performance test for overriden methods. Makes sure that default case
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// is faster (cached) than the general case.
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// Default, cached.
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var startTime = new Date();
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for (var i = 0; i < 1000; i++) {
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'a'.localeCompare('c');
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}
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var endTime = new Date();
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var cachedTime = endTime.getTime() - startTime.getTime();
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// Not cached.
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startTime = new Date();
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for (var i = 0; i < 1000; i++) {
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'a'.localeCompare('c', 'sr');
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}
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endTime = new Date();
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var nonCachedTime = endTime.getTime() - startTime.getTime();
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// Using collator. Faster than default, but not by much.
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var collator = Intl.Collator();
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startTime = new Date();
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for (var i = 0; i < 1000; i++) {
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collator.compare('a', 'c');
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}
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endTime = new Date();
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collatorTime = endTime.getTime() - startTime.getTime();
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// Difference is within 20%.
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assertTrue(collatorTime < cachedTime);
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// Non-cached time is much slower, measured to 12.5 times.
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assertTrue(cachedTime < nonCachedTime);
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