From 1c7a1333c35952a55ba288f0324586e0c11b7b28 Mon Sep 17 00:00:00 2001
From: Sebastian Markbage <sema@fb.com>
Date: Mon, 2 Dec 2019 16:41:17 -0800
Subject: [PATCH] Comment

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

diff --git a/packages/react-reconciler/src/ReactFiberCompleteWork.js b/packages/react-reconciler/src/ReactFiberCompleteWork.js
index 84e3293bd05a..a610391b5f9e 100644
--- a/packages/react-reconciler/src/ReactFiberCompleteWork.js
+++ b/packages/react-reconciler/src/ReactFiberCompleteWork.js
@@ -1114,6 +1114,8 @@ function completeWork(
               return null;
             }
           } else if (
+            // The time it took to render last row is greater than time until
+            // the expiration.
             now() * 2 - renderState.renderingStartTime >
               renderState.tailExpiration &&
             renderExpirationTime > Never