diff --git a/benchmark/events/ee-add-once.js b/benchmark/events/ee-add-once.js
new file mode 100644
index 00000000000000..532f3be9c6b924
--- /dev/null
+++ b/benchmark/events/ee-add-once.js
@@ -0,0 +1,23 @@
+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() {});
+
+  ee.setMaxListeners(n * 10);
+
+  bench.start();
+  for (var i = 0; i < n; i += 1) {
+    for (var k = listeners.length; --k >= 0; /* empty */)
+      ee.once('dummy', listeners[k]);
+  }
+  bench.end(n);
+}
diff --git a/benchmark/events/ee-add-remove.js b/benchmark/events/ee-add-remove-on.js
similarity index 100%
rename from benchmark/events/ee-add-remove.js
rename to benchmark/events/ee-add-remove-on.js
diff --git a/benchmark/events/ee-emit-mixed.js b/benchmark/events/ee-emit-mixed.js
new file mode 100644
index 00000000000000..979cd78ce2fac1
--- /dev/null
+++ b/benchmark/events/ee-emit-mixed.js
@@ -0,0 +1,23 @@
+var common = require('../common.js');
+var EventEmitter = require('events').EventEmitter;
+
+var bench = common.createBenchmark(main, {n: [2e6]});
+
+function main(conf) {
+  var n = conf.n | 0;
+
+  var ee = new EventEmitter();
+
+  for (var k = 0; k < 10; k += 1) {
+    if (k % 2)
+      ee.once('dummy', function() {});
+    else
+      ee.on('dummy', function() {});
+  }
+
+  bench.start();
+  for (var i = 0; i < n; i += 1) {
+    ee.emit('dummy');
+  }
+  bench.end(n);
+}
diff --git a/benchmark/events/ee-emit-multi-args-mixed.js b/benchmark/events/ee-emit-multi-args-mixed.js
new file mode 100644
index 00000000000000..49cff4894870d8
--- /dev/null
+++ b/benchmark/events/ee-emit-multi-args-mixed.js
@@ -0,0 +1,24 @@
+var common = require('../common.js');
+var EventEmitter = require('events').EventEmitter;
+
+var bench = common.createBenchmark(main, {n: [2e6]});
+
+function main(conf) {
+  var n = conf.n | 0;
+
+  var ee = new EventEmitter();
+  var listeners = [];
+
+  for (var k = 0; k < 10; k += 1) {
+    if (k % 2)
+      ee.once('dummy', function() {});
+    else
+      ee.on('dummy', function() {});
+  }
+
+  bench.start();
+  for (var i = 0; i < n; i += 1) {
+    ee.emit('dummy', 5, true);
+  }
+  bench.end(n);
+}
diff --git a/benchmark/events/ee-emit-multi-args.js b/benchmark/events/ee-emit-multi-args-on.js
similarity index 100%
rename from benchmark/events/ee-emit-multi-args.js
rename to benchmark/events/ee-emit-multi-args-on.js
diff --git a/benchmark/events/ee-emit-multi-args-once.js b/benchmark/events/ee-emit-multi-args-once.js
new file mode 100644
index 00000000000000..bfb4497b1682cd
--- /dev/null
+++ b/benchmark/events/ee-emit-multi-args-once.js
@@ -0,0 +1,20 @@
+var common = require('../common.js');
+var EventEmitter = require('events').EventEmitter;
+
+var bench = common.createBenchmark(main, {n: [2e6]});
+
+function main(conf) {
+  var n = conf.n | 0;
+
+  var ee = new EventEmitter();
+  var listeners = [];
+
+  for (var k = 0; k < 10; k += 1)
+    ee.once('dummy', function() {});
+
+  bench.start();
+  for (var i = 0; i < n; i += 1) {
+    ee.emit('dummy', 5, true);
+  }
+  bench.end(n);
+}
diff --git a/benchmark/events/ee-emit.js b/benchmark/events/ee-emit-on.js
similarity index 100%
rename from benchmark/events/ee-emit.js
rename to benchmark/events/ee-emit-on.js
diff --git a/benchmark/events/ee-emit-once.js b/benchmark/events/ee-emit-once.js
new file mode 100644
index 00000000000000..49fe3e90d1bbec
--- /dev/null
+++ b/benchmark/events/ee-emit-once.js
@@ -0,0 +1,20 @@
+var common = require('../common.js');
+//var EventEmitter = require('../../lib/events').EventEmitter;
+var EventEmitter = require('events').EventEmitter;
+
+var bench = common.createBenchmark(main, {n: [2e7]});
+
+function main(conf) {
+  var n = conf.n | 0;
+
+  var ee = new EventEmitter();
+
+  for (var k = 0; k < 10; k += 1)
+    ee.once('dummy', function() {});
+
+  bench.start();
+  for (var i = 0; i < n; i += 1) {
+    ee.emit('dummy');
+  }
+  bench.end(n);
+}