perf: add fast-path comparison in MultiResponseMessages (#22100)

Same optimization as ResponseMessage: add O(1) fast-path check on content and done fields before falling back to full JSON.stringify comparison. Avoids expensive serialization when only content changes during streaming.
2026-03-01 13:44:59 -05:00
parent c436e0366c
commit 1b89bee098
1 changed files with 7 additions and 2 deletions
@@ -62,8 +62,13 @@
 	let message = structuredClone(history.messages[messageId]);
 	$: if (history.messages) {
-		if (JSON.stringify(message) !== JSON.stringify(history.messages[messageId])) {
+		const source = history.messages[messageId];
-			message = structuredClone(history.messages[messageId]);
+		if (source) {
 			if (message.content !== source.content || message.done !== source.done) {
 				message = structuredClone(source);
 			} else if (JSON.stringify(message) !== JSON.stringify(source)) {
 				message = structuredClone(source);
 			}
 		}
 	}