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fix(latency): resolve message delivery slowness on restart and fresh

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fix(latency): resolve message delivery slowness on restart and fresh
This commit is contained in:
Renato Alcara
2026-02-27 11:57:16 -03:00
committed by GitHub
parent d233a7856f
commit 2faa107549
3 changed files with 52 additions and 16 deletions
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src/Socket/chats.ts
+25 -15
View File
@@ -89,7 +89,8 @@ export const makeChatsSocket = (config: SocketConfig) => {
query,
signalRepository,
onUnexpectedError,
sendUnifiedSession
sendUnifiedSession,
skipOfflineBuffer: socketSkippedOfflineBuffer
} = sock
const getLIDForPN = signalRepository.lidMapping.getLIDForPN.bind(signalRepository.lidMapping)
@@ -1436,15 +1437,21 @@ export const makeChatsSocket = (config: SocketConfig) => {
logger.info('Connection is now AwaitingInitialSync, buffering events')
ev.buffer()
// On reconnections (accountSyncCounter > 0), app state was already synced in a previous
// session. Skip the 20s AwaitingInitialSync wait and go directly to Online so that
// live incoming messages are not held in the buffer for up to 20-60 seconds.
// History messages that arrive later are still processed via processMessage regardless
// of the state machine phase (see the Syncing → Online path below).
const isReconnection = (authState.creds.accountSyncCounter ?? 0) > 0
// On reconnections, app state was already synced in a previous session.
// Skip the AwaitingInitialSync wait and go directly to Online so that
// live incoming messages are not held in the buffer for up to 4 seconds.
//
// Two signals indicate a reconnect (either is sufficient):
// 1. accountSyncCounter > 0 — at least one full sync completed before
// 2. socketSkippedOfflineBuffer — socket.ts already determined this is a
// reconnect (e.g. stale routingInfo was cleared) and skipped the offline
// phase buffer. Keeping the second buffer active while the first was already
// skipped would cause a mismatch: events flow immediately then stall for 4s.
const isReconnection = (authState.creds.accountSyncCounter ?? 0) > 0 || socketSkippedOfflineBuffer
if (isReconnection) {
logger.info(
'Reconnection detected (accountSyncCounter > 0), skipping AwaitingInitialSync wait. Transitioning to Online immediately.'
{ accountSyncCounter: authState.creds.accountSyncCounter, socketSkippedOfflineBuffer },
'Reconnection detected, skipping AwaitingInitialSync wait. Transitioning to Online immediately.'
)
blockedCollections.clear()
syncState = SyncState.Online
@@ -1472,12 +1479,15 @@ export const makeChatsSocket = (config: SocketConfig) => {
return
}
// perf(inbound-latency): reduced from 20s → 8s. On first connection we wait for the
// history-sync notification so that doAppStateSync runs before live messages are emitted.
// If the notification does not arrive within 8s we stop waiting, go Online, and flush
// so that any live message arriving after connection is never held more than ~8s.
// perf(inbound-latency): reduced from 20s → 8s → 4s. On first connection we wait for
// the history-sync notification so that doAppStateSync runs before live messages are
// emitted. If the notification does not arrive within 4s we stop waiting, go Online,
// and flush so that any live message arriving after connection is never held more than 4s.
// History that arrives late is still processed via processMessage regardless of state.
logger.info('First connection, awaiting history sync notification with an 8s timeout.')
// This 4s timeout fires before the event-buffer's own adaptive safety timer
// (BAILEYS_BUFFER_TIMEOUT_MS defaults to 5s), ensuring the buffer cannot stall
// beyond 4s on a first connect regardless of event rate.
logger.info('First connection, awaiting history sync notification with a 4s timeout.')
if (awaitingSyncTimeout) {
clearTimeout(awaitingSyncTimeout)
@@ -1485,7 +1495,7 @@ export const makeChatsSocket = (config: SocketConfig) => {
awaitingSyncTimeout = setTimeout(() => {
if (syncState === SyncState.AwaitingInitialSync) {
logger.warn('Timeout in AwaitingInitialSync (8s), forcing state to Online and flushing buffer')
logger.warn('Timeout in AwaitingInitialSync (4s), forcing state to Online and flushing buffer')
syncState = SyncState.Online
ev.flush()
@@ -1495,7 +1505,7 @@ export const makeChatsSocket = (config: SocketConfig) => {
const accountSyncCounter = (authState.creds.accountSyncCounter || 0) + 1
ev.emit('creds.update', { accountSyncCounter })
}
}, 8_000)
}, 4_000)
})
// When an app state sync key arrives (myAppStateKeyId is set) and there are
src/Socket/socket.ts
+7 -1
View File
@@ -1797,7 +1797,13 @@ export const makeSocket = (config: SocketConfig) => {
/** Update server time offset (call when receiving server timestamps) */
updateServerTimeOffset: (serverTime: string | number) => {
unifiedSessionManager?.updateServerTimeOffset(serverTime)
}
},
/**
* Whether the offline-phase buffer was skipped for this connection.
* true → this is a reconnect of an existing session (skip all sync waits in chats.ts too)
* false → fresh QR-scan or first connection (normal sync flow applies)
*/
skipOfflineBuffer
}
}