From b09d6a3602c55aad2dffc182f369b78a9a09a753 Mon Sep 17 00:00:00 2001
From: Adlai Holler <guy.on.internet@icloud.com>
Date: Tue, 13 Oct 2015 21:22:03 -0700
Subject: [PATCH] Demote Photos.framework image requests to UserInitiated
 quality of service

---
 AsyncDisplayKit/ASMultiplexImageNode.mm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/AsyncDisplayKit/ASMultiplexImageNode.mm b/AsyncDisplayKit/ASMultiplexImageNode.mm
index 648c9bb7a0..6fb1f63fed 100644
--- a/AsyncDisplayKit/ASMultiplexImageNode.mm
+++ b/AsyncDisplayKit/ASMultiplexImageNode.mm
@@ -606,6 +606,10 @@ typedef void(^ASMultiplexImageLoadCompletionBlock)(UIImage *image, id imageIdent
       }
     }];
   }];
+  if (AS_AT_LEAST_IOS8) {
+    // If you don't set this, iOS will sometimes infer NSQualityOfServiceUserInteractive and promote the entire queue to that level, damaging system responsiveness
+    newImageRequestOp.qualityOfService = NSQualityOfServiceUserInitiated;
+  }
   _phImageRequestOperation = newImageRequestOp;
   [phImageRequestQueue addOperation:newImageRequestOp];
 }