From a42dcf4f7b10eab60bc97d89719eca05731dda35 Mon Sep 17 00:00:00 2001
From: Bartosz Kaszubowski <gosimek@gmail.com>
Date: Thu, 5 Mar 2015 21:20:48 +0100
Subject: [PATCH] initialize dev variables in dev mode only

---
 src/core/shouldUpdateReactComponent.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/core/shouldUpdateReactComponent.js b/src/core/shouldUpdateReactComponent.js
index 49a35a2730..7892c86375 100644
--- a/src/core/shouldUpdateReactComponent.js
+++ b/src/core/shouldUpdateReactComponent.js
@@ -36,11 +36,11 @@ function shouldUpdateReactComponent(prevElement, nextElement) {
           prevElement.type === nextElement.type &&
           prevElement.key === nextElement.key) {
         var ownersMatch = prevElement._owner === nextElement._owner;
-        var prevName = null;
-        var nextName = null;
-        var nextDisplayName = null;
         if (__DEV__) {
           if (!ownersMatch) {
+            var prevName = null;
+            var nextName = null;
+            var nextDisplayName = null;
             if (prevElement._owner != null &&
                 prevElement._owner.getPublicInstance() != null &&
                 prevElement._owner.getPublicInstance().constructor != null) {