From 06fb1dd587b03556650086c1d6e4012de9315622 Mon Sep 17 00:00:00 2001
From: fabriziobertoglio1987 <fabrizio.bertoglio@gmail.com>
Date: Wed, 6 Jul 2022 13:06:53 +0800
Subject: [PATCH] adding comments to scroll to top/bottom optimization

---
 Libraries/Lists/VirtualizedList.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Libraries/Lists/VirtualizedList.js b/Libraries/Lists/VirtualizedList.js
index dafd1d226203bd..e2abd1a1738607 100644
--- a/Libraries/Lists/VirtualizedList.js
+++ b/Libraries/Lists/VirtualizedList.js
@@ -944,6 +944,7 @@ class VirtualizedList extends React.PureComponent<Props, State> {
         ? -1
         : initialNumToRenderOrDefault(this.props.initialNumToRender) - 1;
       const {first, last} = this.state;
+      // scroll to top optimization. The first page is always rendered.
       if (!this.props.inverted) {
         this._pushCells(
           cells,
@@ -1006,6 +1007,7 @@ class VirtualizedList extends React.PureComponent<Props, State> {
         firstAfterInitial,
         last,
       );
+      // scroll to bottom optimization. The last page is always rendered in an inverted flatlist.
       if (this.props.inverted) {
         this._pushCells(
           cells,