From 43fe81dd9f2d1c1e73b7293700e508e0d8c03263 Mon Sep 17 00:00:00 2001
From: Ryan Nystrom <rnystrom@instagram.com>
Date: Tue, 13 Feb 2018 10:07:45 -0800
Subject: [PATCH] Tell compiler not to retain in helper functions

Summary: Tiny, measurable perf gain by removing any retains on these params.

Reviewed By: manicakes

Differential Revision: D6968685

fbshipit-source-id: f0ef1ecac6367661d125ea85dc1c9989bf2e9659
---
 Source/Common/IGListDiff.mm | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Source/Common/IGListDiff.mm b/Source/Common/IGListDiff.mm
index 98837c856..30b782188 100644
--- a/Source/Common/IGListDiff.mm
+++ b/Source/Common/IGListDiff.mm
@@ -47,7 +47,7 @@
     }
 };
 
-static id<NSObject> IGListTableKey(id<IGListDiffable> object) {
+static id<NSObject> IGListTableKey(__unsafe_unretained id<IGListDiffable> object) {
     id<NSObject> key = [object diffIdentifier];
     NSCAssert(key != nil, @"Cannot use a nil key for the diffIdentifier of object %@", object);
     return key;
@@ -65,7 +65,7 @@ size_t operator()(const id o) const {
     }
 };
 
-static void addIndexToMap(BOOL useIndexPaths, NSInteger section, NSInteger index, id<IGListDiffable> object, NSMapTable *map) {
+static void addIndexToMap(BOOL useIndexPaths, NSInteger section, NSInteger index, __unsafe_unretained id<IGListDiffable> object, __unsafe_unretained NSMapTable *map) {
     id value;
     if (useIndexPaths) {
         value = [NSIndexPath indexPathForItem:index inSection:section];
@@ -75,7 +75,7 @@ static void addIndexToMap(BOOL useIndexPaths, NSInteger section, NSInteger index
     [map setObject:value forKey:[object diffIdentifier]];
 }
 
-static void addIndexToCollection(BOOL useIndexPaths, id collection, NSInteger section, NSInteger index) {
+static void addIndexToCollection(BOOL useIndexPaths, __unsafe_unretained id collection, NSInteger section, NSInteger index) {
     if (useIndexPaths) {
         NSIndexPath *path = [NSIndexPath indexPathForItem:index inSection:section];
         [collection addObject:path];