From 8bccac9a7940ca301e1db49faf777b9e0b3a1d9a Mon Sep 17 00:00:00 2001
From: zhongwuzw <zhongwuzw@qq.com>
Date: Mon, 29 Jan 2018 20:28:55 -0800
Subject: [PATCH] Optimize SEL search efficiency

Summary:
Optimize `SEL` search efficiency, reduced the time complexity from O (n) to O (1).

Not need tests.

- [x] All tests pass. Demo project builds and runs.
- [x] I added tests, an experiment, or detailed why my change isn't tested.
- [x] I added an entry to the `CHANGELOG.md` for any breaking changes, enhancements, or bug fixes.
- [x] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/master/.github/CONTRIBUTING.md)
Closes https://github.com/Instagram/IGListKit/pull/1055

Differential Revision: D6839942

Pulled By: rnystrom

fbshipit-source-id: 911755d6f8a4cd79b387423a51b6ea44cc7a2a07
---
 CHANGELOG.md                         | 2 ++
 Source/Internal/IGListAdapterProxy.m | 8 +++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index de605624..d7212b5f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,8 @@ The changelog for `IGListKit`. Also see the [releases](https://github.com/instag
 
 - Added new `transitionDelegate` API to give `IGListSectionController`s control to customize initial and final `UICollectionViewLayoutAttribute`s. Includes automatic integration with `IGListCollectionViewLayout`. Sue Suhan Ma [(26924ec)](https://github.com/Instagram/IGListKit/commit/26924ec3b665d37aeed7e28887e4221a7f3501b1)
 
+- Reordered position of intercepted selector in `IGListAdapterProxy`'s `isInterceptedSelector` method to reduce overall consumption of compare. [zhongwuzw](https://github.com/zhongwu) [(#1055)](https://github.com/Instagram/IGListKit/pull/1055)
+
 ### Fixes
 
 - Duplicate objects for initial data source setup filtered out. [Mikhail Vashlyaev](https://github.com/yemodin) [(#993](https://github.com/Instagram/IGListKit/pull/993)
diff --git a/Source/Internal/IGListAdapterProxy.m b/Source/Internal/IGListAdapterProxy.m
index 7b0bc214..9fa6abc4 100644
--- a/Source/Internal/IGListAdapterProxy.m
+++ b/Source/Internal/IGListAdapterProxy.m
@@ -18,10 +18,15 @@
  */
 static BOOL isInterceptedSelector(SEL sel) {
     return (
+            // UIScrollViewDelegate
+            sel == @selector(scrollViewDidScroll:) ||
+            sel == @selector(scrollViewWillBeginDragging:) ||
+            sel == @selector(scrollViewDidEndDragging:willDecelerate:) ||
+            sel == @selector(scrollViewDidEndDecelerating:) ||
             // UICollectionViewDelegate
-            sel == @selector(collectionView:didSelectItemAtIndexPath:) ||
             sel == @selector(collectionView:willDisplayCell:forItemAtIndexPath:) ||
             sel == @selector(collectionView:didEndDisplayingCell:forItemAtIndexPath:) ||
+            sel == @selector(collectionView:didSelectItemAtIndexPath:) ||
             sel == @selector(collectionView:didHighlightItemAtIndexPath:) ||
             sel == @selector(collectionView:didUnhighlightItemAtIndexPath:) ||
             // UICollectionViewDelegateFlowLayout
@@ -31,6 +36,7 @@ static BOOL isInterceptedSelector(SEL sel) {
             sel == @selector(collectionView:layout:minimumLineSpacingForSectionAtIndex:) ||
             sel == @selector(collectionView:layout:referenceSizeForFooterInSection:) ||
             sel == @selector(collectionView:layout:referenceSizeForHeaderInSection:) ||
+            sel == @selector(collectionView:layout:referenceSizeForHeaderInSection:) ||
             // UIScrollViewDelegate
             sel == @selector(scrollViewDidScroll:) ||
             sel == @selector(scrollViewWillBeginDragging:) ||