From 15b6f2e2811348fa94ee8d5e8dc131913df662ae Mon Sep 17 00:00:00 2001
From: Adlai Holler <adlai@pinterest.com>
Date: Thu, 16 Jun 2016 17:10:33 -0700
Subject: [PATCH] [ASLayoutTransition] Optimize add/remove subnode methods

---
 AsyncDisplayKit/Private/ASLayoutTransition.mm | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/AsyncDisplayKit/Private/ASLayoutTransition.mm b/AsyncDisplayKit/Private/ASLayoutTransition.mm
index 67709cc302..560ac6135e 100644
--- a/AsyncDisplayKit/Private/ASLayoutTransition.mm
+++ b/AsyncDisplayKit/Private/ASLayoutTransition.mm
@@ -48,9 +48,12 @@
 {
   ASDN::MutexLocker l(_propertyLock);
   [self calculateSubnodeOperationsIfNeeded];
-  for (NSUInteger i = 0; i < [_insertedSubnodes count]; i++) {
+  
+  NSUInteger i = 0;
+  for (ASDisplayNode *node in _insertedSubnodes) {
     NSUInteger p = _insertedSubnodePositions[i];
-    [_node insertSubnode:_insertedSubnodes[i] atIndex:p];
+    [_node insertSubnode:node atIndex:p];
+    i += 1;
   }
 }
 
@@ -58,8 +61,8 @@
 {
   ASDN::MutexLocker l(_propertyLock);
   [self calculateSubnodeOperationsIfNeeded];
-  for (NSUInteger i = 0; i < [_removedSubnodes count]; i++) {
-    [_removedSubnodes[i] removeFromSupernode];
+  for (ASDisplayNode *subnode in _removedSubnodes) {
+    [subnode removeFromSupernode];
   }
 }