From 77d66552741b5bd80c533902a8728f8cb7918c7f Mon Sep 17 00:00:00 2001
From: Aleksi Hietanen <aleksi@vaadin.com>
Date: Tue, 5 Sep 2017 08:42:52 +0300
Subject: [PATCH] Fix grid client side performance regression (#9913)

Trigger update of header/footer only if visibility changes.

Fixes #9884
---
 client/src/main/java/com/vaadin/client/widgets/Grid.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/client/src/main/java/com/vaadin/client/widgets/Grid.java b/client/src/main/java/com/vaadin/client/widgets/Grid.java
index 6799e46e20..dd9353155e 100755
--- a/client/src/main/java/com/vaadin/client/widgets/Grid.java
+++ b/client/src/main/java/com/vaadin/client/widgets/Grid.java
@@ -700,8 +700,10 @@ public class Grid<T> extends ResizeComposite implements HasSelectionHandlers<T>,
          *            true to show this section, false to hide
          */
         public void setVisible(boolean visible) {
-            this.visible = visible;
-            requestSectionRefresh();
+            if (this.visible != visible) {
+                this.visible = visible;
+                requestSectionRefresh();
+            }
         }
 
         /**
-- 
2.39.5