From 73c3832d0be0d4039f5cfdae13b7c180a094d26e Mon Sep 17 00:00:00 2001
From: Brian Vaughn <bvaughn@fb.com>
Date: Wed, 7 Nov 2018 13:39:53 -0800
Subject: [PATCH] Tag MemoComponent with PerformedWork effectTag for DevTools
 Profiler

---
 packages/react-reconciler/src/ReactFiberBeginWork.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/packages/react-reconciler/src/ReactFiberBeginWork.js b/packages/react-reconciler/src/ReactFiberBeginWork.js
index 4e7ab1171d8b4..7891394377f1f 100644
--- a/packages/react-reconciler/src/ReactFiberBeginWork.js
+++ b/packages/react-reconciler/src/ReactFiberBeginWork.js
@@ -283,6 +283,8 @@ function updateMemoComponent(
       );
     }
   }
+  // React DevTools reads this flag.
+  workInProgress.effectTag |= PerformedWork;
   let newChild = createWorkInProgress(
     currentChild,
     nextProps,