node splitN benchmark

bench.js

var Benchmark = require('benchmark');
var suite = new Benchmark.Suite;
suite.add('indexOf', function() {
    var s = "time:2017-01-01T11:22:33Z"
    var i = s.indexOf(":")
    return [ s.slice(0,i), s.slice(i+1) ];
})
.add("replace\\0", function() {
    var s = "time:2017-01-01T11:22:33Z"
    return s.replace(":", "\0").split("\0");
})
.add("regexp", function() {
    var s = "time:2017-01-01T11:22:33Z"
    var m = s.match(/^(.*?):(.*)$/);
    return [ m[1], m[2] ];
})
.on('cycle', function(event) {
  console.log(String(event.target));
})
.on('complete', function() {
  console.log('Fastest is ' + this.filter('fastest').map('name'));
})
// run async 
.run({ 'async': true });

result.txt

$ node -v
v7.0.0

$ node splitN.js
indexOf x 7,990,197 ops/sec ±2.28% (82 runs sampled)
replace\0 x 1,737,003 ops/sec ±1.56% (85 runs sampled)
regexp x 6,124,354 ops/sec ±1.91% (86 runs sampled)
Fastest is indexOf