From fc5f3995737978fe574eb50cd547a4310bb141d0 Mon Sep 17 00:00:00 2001
From: Algorithm5838 <108630393+Algorithm5838@users.noreply.github.com>
Date: Sat, 28 Feb 2026 22:13:48 +0300
Subject: [PATCH] perf: batch scrollToBottom during streaming via rAF (#21946)

---
 src/lib/components/chat/Chat.svelte | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/lib/components/chat/Chat.svelte b/src/lib/components/chat/Chat.svelte
index 52a7aa925..42a509583 100644
--- a/src/lib/components/chat/Chat.svelte
+++ b/src/lib/components/chat/Chat.svelte
@@ -1281,6 +1281,16 @@
 			});
 		}
 	};
+
+	let scrollRAF = null;
+	const scheduleScrollToBottom = () => {
+		if (!scrollRAF) {
+			scrollRAF = requestAnimationFrame(async () => {
+				scrollRAF = null;
+				await scrollToBottom();
+			});
+		}
+	};
 	const chatCompletedHandler = async (_chatId, modelId, responseMessageId, messages) => {
 		const res = await chatCompleted(localStorage.token, {
 			model: modelId,
@@ -1698,7 +1708,7 @@
 		await tick();
 
 		if (autoScroll) {
-			scrollToBottom();
+			scheduleScrollToBottom();
 		}
 	};
 
@@ -2482,7 +2492,7 @@
 					}
 
 					if (autoScroll) {
-						scrollToBottom();
+						scheduleScrollToBottom();
 					}
 				}