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| 1 // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 new BenchmarkSuite('Closures', [1000], [ |
| 6 new Benchmark('ShortLivingClosures', false, false, 0, |
| 7 ShortLivingClosures, ShortLivingClosuresSetup, ShortLivingClosuresTearDown) |
| 8 ]); |
| 9 |
| 10 // ---------------------------------------------------------------------------- |
| 11 |
| 12 |
| 13 // The pattern is this example is very common in Node.js. |
| 14 var fs = { |
| 15 readFile: function(filename, cb) { |
| 16 cb(null, {length: 12}); |
| 17 } |
| 18 }; |
| 19 |
| 20 |
| 21 function printLength (filename) { |
| 22 fs.readFile(filename, foo); |
| 23 |
| 24 function foo (err, buf) { |
| 25 if (err) return; |
| 26 for (var j = 0; j<1000; j++) { |
| 27 // Do some work to make the optimization actually worth while |
| 28 buf.length++; |
| 29 } |
| 30 return (buf.length); |
| 31 } |
| 32 } |
| 33 |
| 34 |
| 35 function ShortLivingClosuresSetup() {} |
| 36 |
| 37 function ShortLivingClosures() { |
| 38 result = printLength('foo_bar.js'); |
| 39 } |
| 40 |
| 41 function ShortLivingClosuresTearDown() { |
| 42 return result == 1012; |
| 43 } |
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