fix: improve render performance in app

src/routes/conversation/[id]/+page.svelte

@@ -242,7 +242,6 @@
 				);
 			}
 
-			messages = [...messages];
 			const userMessage = messages.find((message) => message.id === messageId);
 			const messageToWriteTo = messages.find((message) => message.id === messageToWriteToId);
 			if (!messageToWriteTo) {
@@ -284,17 +283,24 @@
 					update.token = update.token.replaceAll("\0", "");
 				}
 
-				messageToWriteTo.updates = [...(messageToWriteTo.updates ?? []), update];
+				// dont write updates for reasoning stream and normal stream to reduce render load
+				// but handle the rest
+
+				// Skip storing high-frequency updates to reduce render load
+				const isHighFrequencyUpdate =
+					(update.type === MessageUpdateType.Reasoning &&
+						update.subtype === MessageReasoningUpdateType.Stream) ||
+					update.type === MessageUpdateType.Stream ||
+					(update.type === MessageUpdateType.Status &&
+						update.status === MessageUpdateStatus.KeepAlive);
+
+				if (!isHighFrequencyUpdate) {
+					messageToWriteTo.updates = [...(messageToWriteTo.updates ?? []), update];
+				}
 
 				if (update.type === MessageUpdateType.Stream && !$settings.disableStream) {
 					messageToWriteTo.content += update.token;
 					pending = false;
-					messages = [...messages];
-				} else if (
-					update.type === MessageUpdateType.WebSearch ||
-					update.type === MessageUpdateType.Tool
-				) {
-					messages = [...messages];
 				} else if (
 					update.type === MessageUpdateType.Status &&
 					update.status === MessageUpdateStatus.Error
@@ -315,17 +321,13 @@
 						...(messageToWriteTo.files ?? []),
 						{ type: "hash", value: update.sha, mime: update.mime, name: update.name },
 					];
-					messages = [...messages];
 				} else if (update.type === MessageUpdateType.Reasoning) {
 					if (!messageToWriteTo.reasoning) {
 						messageToWriteTo.reasoning = "";
 					}
 					if (update.subtype === MessageReasoningUpdateType.Stream) {
 						messageToWriteTo.reasoning += update.token;
-					} else {
-						messageToWriteTo.updates = [...(messageToWriteTo.updates ?? []), update];
 					}
-					messages = [...messages];
 				}
 			}
 		} catch (err) {