From 8687645c50b0211f60ded688d95fedd9735a37ee Mon Sep 17 00:00:00 2001
From: Tim Yung <yungsters@fb.com>
Date: Wed, 10 Jul 2013 14:45:01 -0700
Subject: [PATCH] Reduce Lookup for Missing Lifecycle Methods

This is a micro-optimization that reduces the lookup time for missing lifecycle methods. The extra amount of memory is linear to the number of components that exist on a page which I think is a worthwile trade-off.
---
 src/core/ReactCompositeComponent.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/core/ReactCompositeComponent.js b/src/core/ReactCompositeComponent.js
index d76939bb6c..95b1019fa7 100644
--- a/src/core/ReactCompositeComponent.js
+++ b/src/core/ReactCompositeComponent.js
@@ -875,6 +875,12 @@ var ReactCompositeComponent = {
       Constructor.prototype.render,
       'createClass(...): Class specification must implement a `render` method.'
     );
+    // Reduce time spent doing lookups by setting these on the prototype.
+    for (var methodName in ReactCompositeComponentInterface) {
+      if (!Constructor.prototype[methodName]) {
+        Constructor.prototype[methodName] = null;
+      }
+    }
 
     var ConvenienceConstructor = function(props, children) {
       var instance = new Constructor();