benchmark: add more EventEmitter benchmarks

PR-URL: https://github.com/iojs/io.js/pull/730
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Brendan Ashworth <brendan.ashworth@me.com>

benchmark/events/ee-emit-multi-args.js

@@ -0,0 +1,20 @@
+var common = require('../common.js');
+var EventEmitter = require('events').EventEmitter;
+
+var bench = common.createBenchmark(main, {n: [25e4]});
+
+function main(conf) {
+  var n = conf.n | 0;
+
+  var ee = new EventEmitter();
+  var listeners = [];
+
+  for (var k = 0; k < 10; k += 1)
+    ee.on('dummy', function() {});
+
+  bench.start();
+  for (var i = 0; i < n; i += 1) {
+    ee.emit('dummy', 5, true);
+  }
+  bench.end(n);
+}

benchmark/events/ee-emit.js

@@ -0,0 +1,19 @@
+var common = require('../common.js');
+var EventEmitter = require('events').EventEmitter;
+
+var bench = common.createBenchmark(main, {n: [25e4]});
+
+function main(conf) {
+  var n = conf.n | 0;
+
+  var ee = new EventEmitter();
+
+  for (var k = 0; k < 10; k += 1)
+    ee.on('dummy', function() {});
+
+  bench.start();
+  for (var i = 0; i < n; i += 1) {
+    ee.emit('dummy');
+  }
+  bench.end(n);
+}

benchmark/events/ee-listener-count.js

@@ -0,0 +1,20 @@
+var common = require('../common.js');
+var EventEmitter = require('events').EventEmitter;
+
+var bench = common.createBenchmark(main, {n: [25e4]});
+
+function main(conf) {
+  var n = conf.n | 0;
+
+  var ee = new EventEmitter();
+  var listenerCount = EventEmitter.listenerCount;
+
+  for (var k = 0; k < 10; k += 1)
+    ee.on('dummy', function() {});
+
+  bench.start();
+  for (var i = 0; i < n; i += 1) {
+    var r = listenerCount(ee, 'dummy');
+  }
+  bench.end(n);
+}

benchmark/events/ee-listeners-many.js

@@ -0,0 +1,20 @@
+var common = require('../common.js');
+var EventEmitter = require('events').EventEmitter;
+
+var bench = common.createBenchmark(main, {n: [25e4]});
+
+function main(conf) {
+  var n = conf.n | 0;
+
+  var ee = new EventEmitter();
+  ee.setMaxListeners(101);
+
+  for (var k = 0; k < 100; k += 1)
+    ee.on('dummy', function() {});
+
+  bench.start();
+  for (var i = 0; i < n; i += 1) {
+    var r = ee.listeners('dummy');
+  }
+  bench.end(n);
+}

benchmark/events/ee-listeners.js

@@ -0,0 +1,19 @@
+var common = require('../common.js');
+var EventEmitter = require('events').EventEmitter;
+
+var bench = common.createBenchmark(main, {n: [25e4]});
+
+function main(conf) {
+  var n = conf.n | 0;
+
+  var ee = new EventEmitter();
+
+  for (var k = 0; k < 10; k += 1)
+    ee.on('dummy', function() {});
+
+  bench.start();
+  for (var i = 0; i < n; i += 1) {
+    var r = ee.listeners('dummy');
+  }
+  bench.end(n);
+}