Created
March 11, 2013 10:57
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benchmark of String.lastIndexOf in Node.js
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var Benchmark = require('benchmark'); | |
Benchmark.prototype.setup = function() { | |
a = ["test"]; | |
for (var i = 0; i < 10000; i++) { | |
a.push("some other stuff"); | |
} | |
s = a.join(); | |
}; | |
var suite = new Benchmark.Suite(); | |
// add tests | |
suite.add('existence', function() { | |
var r1 = (s.lastIndexOf("test") === 0); | |
}) | |
.add('nonexistence', function() { | |
var r2 = (s.lastIndexOf("not there") === 0); | |
}) | |
.add('existence start 0', function() { | |
var r1 = (s.lastIndexOf("test", 0) === 0); | |
}) | |
.add('nonexistence start 0', function() { | |
var r2 = (s.lastIndexOf("not there", 0) === 0); | |
}) | |
.add('existence indexOf', function() { | |
var r1 = (s.indexOf("test") === 0); | |
}) | |
.add('nonexistence indexOf', function() { | |
var r2 = (s.indexOf("not there") === 0); | |
}) | |
// add listeners | |
.on('cycle', function(event) { | |
console.log(String(event.target)); | |
}) | |
.on('complete', function() { | |
console.log('Fastest is ' + this.filter('fastest').pluck('name')); | |
}) | |
// run async | |
.run({ | |
'async': false | |
}); |
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existence x 2,044 ops/sec ±0.98% (78 runs sampled)
nonexistence x 6,596 ops/sec ±0.38% (84 runs sampled)
existence start 0 x 10,002,925 ops/sec ±0.64% (85 runs sampled)
nonexistence start 0 x 10,531,223 ops/sec ±0.73% (93 runs sampled)
existence indexOf x 10,945,037 ops/sec ±0.48% (89 runs sampled)
nonexistence indexOf x 11,610 ops/sec ±13.01% (66 runs sampled)
Fastest is existence indexOf