Merge pull request sindresorhus#73 from STRML/noDeopt

Prevent v8 deopt when using [].slice.call(arguments)

index.js

@@ -131,9 +131,14 @@ Emitter.prototype.removeEventListener = function(event, fn){
 
 Emitter.prototype.emit = function(event){
   this._callbacks = this._callbacks || {};
-  var args = [].slice.call(arguments, 1)
+
+  var args = new Array(arguments.length - 1)
     , callbacks = this._callbacks['$' + event];
 
+  for (var i = 1; i < arguments.length; i++) {
+    args[i - 1] = arguments[i];
+  }
+
   if (callbacks) {
     callbacks = callbacks.slice(0);
     for (var i = 0, len = callbacks.length; i < len; ++i) {