From 1c9651f557c1ed4830c85cdb9185a059f9dba98f Mon Sep 17 00:00:00 2001
From: Jamie Kyle <113370520+jamiebuilds-signal@users.noreply.github.com>
Date: Tue, 1 Aug 2023 10:24:45 -0700
Subject: [PATCH] Revert "optimize timeline scroll performance"

---
 ts/components/conversation/Timeline.tsx | 23 ++++-------------------
 1 file changed, 4 insertions(+), 19 deletions(-)

diff --git a/ts/components/conversation/Timeline.tsx b/ts/components/conversation/Timeline.tsx
index 035b7290a..dd62c58bd 100644
--- a/ts/components/conversation/Timeline.tsx
+++ b/ts/components/conversation/Timeline.tsx
@@ -399,14 +399,12 @@ export class Timeline extends React.Component<
         const newestBottomVisibleMessageId =
           getMessageIdFromElement(newestBottomVisible);
 
-        this.updatePartiallyVisibleMessageIds(
+        this.setState({
           oldestPartiallyVisibleMessageId,
-          newestBottomVisibleMessageId
-        );
+          newestBottomVisibleMessageId,
+        });
 
-        if (this.props.isNearBottom !== newIsNearBottom) {
-          setIsNearBottom(id, newIsNearBottom);
-        }
+        setIsNearBottom(id, newIsNearBottom);
 
         if (newestBottomVisibleMessageId) {
           this.markNewestBottomVisibleMessageRead();
@@ -463,19 +461,6 @@ export class Timeline extends React.Component<
     this.intersectionObserver.observe(atBottomDetectorEl);
   }
 
-  private updatePartiallyVisibleMessageIds = throttle(
-    (
-      oldestPartiallyVisibleMessageId: string | undefined,
-      newestBottomVisibleMessageId: string | undefined
-    ) => {
-      this.setState({
-        oldestPartiallyVisibleMessageId,
-        newestBottomVisibleMessageId,
-      });
-    },
-    100
-  );
-
   private markNewestBottomVisibleMessageRead = throttle((): void => {
     const { id, markMessageRead } = this.props;
     const { newestBottomVisibleMessageId } = this.state;