From c5a521a0b4fa4780b113dc1cd39c00da7f69d44c Mon Sep 17 00:00:00 2001
From: windy <1374721899@qq.com>
Date: Mon, 7 Mar 2022 15:23:12 +0800
Subject: [PATCH] =?UTF-8?q?BI-101931=20virtualgrouplist=E7=A8=8D=E5=BF=AB?=
 =?UTF-8?q?=E6=BB=9A=E5=8A=A8=E5=A4=A7=E9=87=8F=E7=A9=BA=E7=99=BD?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/base/list/virtualgrouplist.js | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/base/list/virtualgrouplist.js b/src/base/list/virtualgrouplist.js
index c1aa416e5..7a4a9323b 100644
--- a/src/base/list/virtualgrouplist.js
+++ b/src/base/list/virtualgrouplist.js
@@ -61,10 +61,17 @@ BI.VirtualGroupList = BI.inherit(BI.Widget, {
             self.populate(newValue);
         }) : o.items;
         this._populate();
-        this.element.scroll(BI.debounce(function (e) {
+        this.ticking = false;
+        this.element.scroll(function() {
             o.scrollTop = self.element.scrollTop();
-            self._calculateBlocksToRender();
-        }, 30));
+            if (!self.ticking) {
+                requestAnimationFrame(function () {
+                    self._calculateBlocksToRender();
+                    self.ticking = false;
+                });
+                self.ticking = true;
+            }
+        });
         BI.ResizeDetector.addResizeListener(this, function () {
             self._calculateBlocksToRender();
         });