perf: reduce message delivery latency across all connection scenarios (#239)

perf: reduce message delivery latency across all connection scenarios (#239)

src/Socket/chats.ts

@@ -102,14 +102,14 @@ export const makeChatsSocket = (config: SocketConfig) => {
 	/** this mutex ensures that messages from the same chat are processed in order, while allowing parallel processing of messages from different chats */
 	const messageMutex = makeKeyedMutex()
 
-	/** this mutex ensures that receipts are processed in order */
-	const receiptMutex = makeMutex()
+	/** this mutex ensures that receipts from the same chat are processed in order, while allowing parallel processing across chats */
+	const receiptMutex = makeKeyedMutex()
 
 	/** this mutex ensures that app state patches are processed in order */
 	const appStatePatchMutex = makeMutex()
 
-	/** this mutex ensures that notifications are processed in order */
-	const notificationMutex = makeMutex()
+	/** this mutex ensures that notifications from the same chat are processed in order, while allowing parallel processing across chats */
+	const notificationMutex = makeKeyedMutex()
 
 	// Timeout for AwaitingInitialSync state
 	let awaitingSyncTimeout: NodeJS.Timeout | undefined
@@ -1495,7 +1495,7 @@ export const makeChatsSocket = (config: SocketConfig) => {
 
 		awaitingSyncTimeout = setTimeout(() => {
 			if (syncState === SyncState.AwaitingInitialSync) {
-				logger.warn('Timeout in AwaitingInitialSync (4s), forcing state to Online and flushing buffer')
+				logger.warn('Timeout in AwaitingInitialSync (2s), forcing state to Online and flushing buffer')
 				syncState = SyncState.Online
 				ev.flush()
 
@@ -1505,7 +1505,7 @@ export const makeChatsSocket = (config: SocketConfig) => {
 				const accountSyncCounter = (authState.creds.accountSyncCounter || 0) + 1
 				ev.emit('creds.update', { accountSyncCounter })
 			}
-		}, 4_000)
+		}, 2_000)
 	})
 
 	// When an app state sync key arrives (myAppStateKeyId is set) and there are

src/Socket/messages-recv.ts

@@ -1282,7 +1282,7 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 
 		try {
 			await Promise.all([
-				receiptMutex.mutex(async () => {
+				receiptMutex.mutex(jidNormalizedUser(remoteJid) || 'unknown', async () => {
 					const status = getStatusFromReceiptType(attrs.type)
 					if (
 						typeof status !== 'undefined' &&
@@ -1356,7 +1356,7 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 
 		try {
 			await Promise.all([
-				notificationMutex.mutex(async () => {
+				notificationMutex.mutex(jidNormalizedUser(remoteJid) || 'unknown', async () => {
 					const msg = await processNotification(node)
 					if (msg) {
 						const fromMe = areJidsSameUser(node.attrs.participant || remoteJid, authState.creds.me!.id)
@@ -1985,7 +1985,7 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 		let isProcessing = false
 
 		// Number of nodes to process before yielding to event loop
-		const BATCH_SIZE = 10
+		const BATCH_SIZE = 25
 
 		const enqueue = (type: MessageType, node: BinaryNode) => {
 			nodes.push({ type, node })

src/Socket/socket.ts

@@ -1667,8 +1667,8 @@ export const makeSocket = (config: SocketConfig) => {
 	// already-authenticated session (no QR re-scan needed). In this case we skip
 	// the offline buffer entirely so live messages are not held hostage waiting for the
 	// server to finish flushing the pending-message backlog (CB:ib,,offline).
-	// For normal restarts (no stale routingInfo) the standard 5 s safety cap applies.
-	const OFFLINE_BUFFER_TIMEOUT_MS = 5_000
+	// For normal restarts (no stale routingInfo) the standard 2 s safety cap applies.
+	const OFFLINE_BUFFER_TIMEOUT_MS = 2_000
 	let offlineBufferTimeout: NodeJS.Timeout | undefined
 
 	process.nextTick(() => {