From 56668f54d11225b0bcdf93dc2fba846febdbb19f Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Wed, 1 Aug 2012 01:29:10 +0200
Subject: [PATCH] events: speed up .removeAllListeners()

---
 lib/events.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/lib/events.js b/lib/events.js
index 732f16872aa..11f91b5ccbd 100644
--- a/lib/events.js
+++ b/lib/events.js
@@ -239,6 +239,17 @@ EventEmitter.prototype.removeListener = function(type, listener) {
 EventEmitter.prototype.removeAllListeners = function(type) {
   if (!this._events) return this;
 
+  // fast path
+  if (!this._events.removeListener) {
+    if (arguments.length === 0) {
+      this._events = {};
+    } else if (type && this._events && this._events[type]) {
+      this._events[type] = null;
+    }
+    return this;
+  }
+
+  // slow(ish) path, emit 'removeListener' events for all removals
   if (arguments.length === 0) {
     for (var key in this._events) {
       if (key === 'removeListener') continue;