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nodejs/benchmark/events/ee-add-remove.js
Ben Noordhuis d3f8db1244 lib: micro-optimize EventEmitter#removeListener()
Replace the call to Array#splice() with a faster open-coded version
that creates less garbage.

Add a new benchmark to prove it.  With the change applied, it scores
a whopping 40% higher.

PR-URL: https://github.com/iojs/io.js/pull/185
Reviewed-By: Chris Dickinson <christopher.s.dickinson@gmail.com>
2014-12-20 02:39:42 +01:00

24 lines
577 B
JavaScript

var common = require('../common.js');
var events = require('events');
var bench = common.createBenchmark(main, {n: [25e4]});
function main(conf) {
var n = conf.n | 0;
var ee = new events.EventEmitter();
var listeners = [];
for (var k = 0; k < 10; k += 1)
listeners.push(function() {});
bench.start();
for (var i = 0; i < n; i += 1) {
for (var k = listeners.length; --k >= 0; /* empty */)
ee.on('dummy', listeners[k]);
for (var k = listeners.length; --k >= 0; /* empty */)
ee.removeListener('dummy', listeners[k]);
}
bench.end(n);
}