From 2dd272e429ee28238d088fff4b2691e7efe804c0 Mon Sep 17 00:00:00 2001
From: Aaron Jensen <aaronjensen@gmail.com>
Date: Sun, 2 Aug 2015 07:06:35 -0700
Subject: [PATCH] Do not call isFrozen on non-freezables

fixes #1
---
 lib/freeze.js | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/lib/freeze.js b/lib/freeze.js
index e4d8eb4..cd1ae6a 100644
--- a/lib/freeze.js
+++ b/lib/freeze.js
@@ -1,9 +1,10 @@
 function isFreezable(obj) {
-  if (Object.isFrozen(obj)) {
-    return false;
-  }
+  return Array.isArray(obj) ||
+    typeof obj === 'object';
+}
 
-  return Array.isArray(obj) || typeof obj === 'object';
+function needsFreezing(obj) {
+  return isFreezable(obj) && !Object.isFrozen(obj);
 }
 
 function recur(obj) {
@@ -11,7 +12,7 @@ function recur(obj) {
 
   Object.keys(obj).forEach((key) => {
     const value = obj[key];
-    if (isFreezable(value)) {
+    if (needsFreezing(value)) {
       recur(value);
     }
   });
@@ -24,7 +25,7 @@ export default function freeze(obj) {
     return obj;
   }
 
-  if (isFreezable(obj)) {
+  if (needsFreezing(obj)) {
     recur(obj);
   }