Index: chrome/test/data/v8_benchmark/base.js |
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-// Copyright 2008 the V8 project authors. All rights reserved. |
-// Redistribution and use in source and binary forms, with or without |
-// modification, are permitted provided that the following conditions are |
-// met: |
-// |
-// * Redistributions of source code must retain the above copyright |
-// notice, this list of conditions and the following disclaimer. |
-// * Redistributions in binary form must reproduce the above |
-// copyright notice, this list of conditions and the following |
-// disclaimer in the documentation and/or other materials provided |
-// with the distribution. |
-// * Neither the name of Google Inc. nor the names of its |
-// contributors may be used to endorse or promote products derived |
-// from this software without specific prior written permission. |
-// |
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
- |
- |
-// Simple framework for running the benchmark suites and |
-// computing a score based on the timing measurements. |
- |
- |
-// A benchmark has a name (string) and a function that will be run to |
-// do the performance measurement. The optional setup and tearDown |
-// arguments are functions that will be invoked before and after |
-// running the benchmark, but the running time of these functions will |
-// not be accounted for in the benchmark score. |
-function Benchmark(name, run, setup, tearDown) { |
- this.name = name; |
- this.run = run; |
- this.Setup = setup ? setup : function() { }; |
- this.TearDown = tearDown ? tearDown : function() { }; |
-} |
- |
- |
-// Benchmark results hold the benchmark and the measured time used to |
-// run the benchmark. The benchmark score is computed later once a |
-// full benchmark suite has run to completion. |
-function BenchmarkResult(benchmark, time) { |
- this.benchmark = benchmark; |
- this.time = time; |
-} |
- |
- |
-// Automatically convert results to numbers. Used by the geometric |
-// mean computation. |
-BenchmarkResult.prototype.valueOf = function() { |
- return this.time; |
-} |
- |
- |
-// Suites of benchmarks consist of a name and the set of benchmarks in |
-// addition to the reference timing that the final score will be based |
-// on. This way, all scores are relative to a reference run and higher |
-// scores implies better performance. |
-function BenchmarkSuite(name, reference, benchmarks) { |
- this.name = name; |
- this.reference = reference; |
- this.benchmarks = benchmarks; |
- BenchmarkSuite.suites.push(this); |
-} |
- |
- |
-// Keep track of all declared benchmark suites. |
-BenchmarkSuite.suites = []; |
- |
- |
-// Scores are not comparable across versions. Bump the version if |
-// you're making changes that will affect that scores, e.g. if you add |
-// a new benchmark or change an existing one. |
-BenchmarkSuite.version = '6'; |
- |
- |
-// To make the benchmark results predictable, we replace Math.random |
-// with a 100% deterministic alternative. |
-Math.random = (function() { |
- var seed = 49734321; |
- return function() { |
- // Robert Jenkins' 32 bit integer hash function. |
- seed = ((seed + 0x7ed55d16) + (seed << 12)) & 0xffffffff; |
- seed = ((seed ^ 0xc761c23c) ^ (seed >>> 19)) & 0xffffffff; |
- seed = ((seed + 0x165667b1) + (seed << 5)) & 0xffffffff; |
- seed = ((seed + 0xd3a2646c) ^ (seed << 9)) & 0xffffffff; |
- seed = ((seed + 0xfd7046c5) + (seed << 3)) & 0xffffffff; |
- seed = ((seed ^ 0xb55a4f09) ^ (seed >>> 16)) & 0xffffffff; |
- return (seed & 0xfffffff) / 0x10000000; |
- }; |
-})(); |
- |
- |
-// Runs all registered benchmark suites and optionally yields between |
-// each individual benchmark to avoid running for too long in the |
-// context of browsers. Once done, the final score is reported to the |
-// runner. |
-BenchmarkSuite.RunSuites = function(runner) { |
- var continuation = null; |
- var suites = BenchmarkSuite.suites; |
- var length = suites.length; |
- BenchmarkSuite.scores = []; |
- var index = 0; |
- function RunStep() { |
- while (continuation || index < length) { |
- if (continuation) { |
- continuation = continuation(); |
- } else { |
- var suite = suites[index++]; |
- if (runner.NotifyStart) runner.NotifyStart(suite.name); |
- continuation = suite.RunStep(runner); |
- } |
- if (continuation && typeof window != 'undefined' && window.setTimeout) { |
- window.setTimeout(RunStep, 25); |
- return; |
- } |
- } |
- if (runner.NotifyScore) { |
- var score = BenchmarkSuite.GeometricMean(BenchmarkSuite.scores); |
- var formatted = BenchmarkSuite.FormatScore(100 * score); |
- runner.NotifyScore(formatted); |
- } |
- } |
- RunStep(); |
-} |
- |
- |
-// Counts the total number of registered benchmarks. Useful for |
-// showing progress as a percentage. |
-BenchmarkSuite.CountBenchmarks = function() { |
- var result = 0; |
- var suites = BenchmarkSuite.suites; |
- for (var i = 0; i < suites.length; i++) { |
- result += suites[i].benchmarks.length; |
- } |
- return result; |
-} |
- |
- |
-// Computes the geometric mean of a set of numbers. |
-BenchmarkSuite.GeometricMean = function(numbers) { |
- var log = 0; |
- for (var i = 0; i < numbers.length; i++) { |
- log += Math.log(numbers[i]); |
- } |
- return Math.pow(Math.E, log / numbers.length); |
-} |
- |
- |
-// Converts a score value to a string with at least three significant |
-// digits. |
-BenchmarkSuite.FormatScore = function(value) { |
- if (value > 100) { |
- return value.toFixed(0); |
- } else { |
- return value.toPrecision(3); |
- } |
-} |
- |
-// Notifies the runner that we're done running a single benchmark in |
-// the benchmark suite. This can be useful to report progress. |
-BenchmarkSuite.prototype.NotifyStep = function(result) { |
- this.results.push(result); |
- if (this.runner.NotifyStep) this.runner.NotifyStep(result.benchmark.name); |
-} |
- |
- |
-// Notifies the runner that we're done with running a suite and that |
-// we have a result which can be reported to the user if needed. |
-BenchmarkSuite.prototype.NotifyResult = function() { |
- var mean = BenchmarkSuite.GeometricMean(this.results); |
- var score = this.reference / mean; |
- BenchmarkSuite.scores.push(score); |
- if (this.runner.NotifyResult) { |
- var formatted = BenchmarkSuite.FormatScore(100 * score); |
- this.runner.NotifyResult(this.name, formatted); |
- } |
-} |
- |
- |
-// Notifies the runner that running a benchmark resulted in an error. |
-BenchmarkSuite.prototype.NotifyError = function(error) { |
- if (this.runner.NotifyError) { |
- this.runner.NotifyError(this.name, error); |
- } |
- if (this.runner.NotifyStep) { |
- this.runner.NotifyStep(this.name); |
- } |
-} |
- |
- |
-// Runs a single benchmark for at least a second and computes the |
-// average time it takes to run a single iteration. |
-BenchmarkSuite.prototype.RunSingleBenchmark = function(benchmark, data) { |
- function Measure(data) { |
- var elapsed = 0; |
- var start = new Date(); |
- for (var n = 0; elapsed < 1000; n++) { |
- benchmark.run(); |
- elapsed = new Date() - start; |
- } |
- if (data != null) { |
- data.runs += n; |
- data.elapsed += elapsed; |
- } |
- } |
- |
- if (data == null) { |
- // Measure the benchmark once for warm up and throw the result |
- // away. Return a fresh data object. |
- Measure(null); |
- return { runs: 0, elapsed: 0 }; |
- } else { |
- Measure(data); |
- // If we've run too few iterations, we continue for another second. |
- if (data.runs < 32) return data; |
- var usec = (data.elapsed * 1000) / data.runs; |
- this.NotifyStep(new BenchmarkResult(benchmark, usec)); |
- return null; |
- } |
-} |
- |
- |
-// This function starts running a suite, but stops between each |
-// individual benchmark in the suite and returns a continuation |
-// function which can be invoked to run the next benchmark. Once the |
-// last benchmark has been executed, null is returned. |
-BenchmarkSuite.prototype.RunStep = function(runner) { |
- this.results = []; |
- this.runner = runner; |
- var length = this.benchmarks.length; |
- var index = 0; |
- var suite = this; |
- var data; |
- |
- // Run the setup, the actual benchmark, and the tear down in three |
- // separate steps to allow the framework to yield between any of the |
- // steps. |
- |
- function RunNextSetup() { |
- if (index < length) { |
- try { |
- suite.benchmarks[index].Setup(); |
- } catch (e) { |
- suite.NotifyError(e); |
- return null; |
- } |
- return RunNextBenchmark; |
- } |
- suite.NotifyResult(); |
- return null; |
- } |
- |
- function RunNextBenchmark() { |
- try { |
- data = suite.RunSingleBenchmark(suite.benchmarks[index], data); |
- } catch (e) { |
- suite.NotifyError(e); |
- return null; |
- } |
- // If data is null, we're done with this benchmark. |
- return (data == null) ? RunNextTearDown : RunNextBenchmark(); |
- } |
- |
- function RunNextTearDown() { |
- try { |
- suite.benchmarks[index++].TearDown(); |
- } catch (e) { |
- suite.NotifyError(e); |
- return null; |
- } |
- return RunNextSetup; |
- } |
- |
- // Start out running the setup. |
- return RunNextSetup(); |
-} |