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Optimization 4: Batch message updates for better performance

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- Added message batching system with 100ms window
- Created pendingMessages array for public messages
- Created pendingPrivateMessages dictionary for private messages
- Added scheduleBatchFlush() to consolidate updates
- Batch all incoming messages from didReceiveMessage
- Batch system messages (connect/disconnect/screenshot)
- Keep immediate updates for user's own sent messages
- Single UI update per batch instead of per message
- Flush pending messages on app background/terminate
- Clear timer on deinit

This reduces UI updates when multiple messages arrive quickly
This commit is contained in:
jack
2025-07-24 13:23:31 +02:00
parent 58876704c3
commit 8d64920f8e
1 changed files with 112 additions and 31 deletions
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bitchat/ViewModels/ChatViewModel.swift
+112 -31
View File
@@ -19,6 +19,12 @@ class ChatViewModel: ObservableObject {
@Published var messages: [BitchatMessage] = []
private let maxMessages = 1337 // Maximum messages before oldest are removed
@Published var connectedPeers: [String] = []
// Message batching for performance
private var pendingMessages: [BitchatMessage] = []
private var pendingPrivateMessages: [String: [BitchatMessage]] = [:] // peerID -> messages
private var messageBatchTimer: Timer?
private let messageBatchInterval: TimeInterval = 0.1 // 100ms batching window
@Published var nickname: String = ""
@Published var isConnected = false
@Published var privateChats: [String: [BitchatMessage]] = [:] // peerID -> messages
@@ -148,6 +154,9 @@ class ChatViewModel: ObservableObject {
}
deinit {
// Clean up timer
messageBatchTimer?.invalidate()
// Force immediate save
userDefaults.synchronize()
}
@@ -378,10 +387,13 @@ class ChatViewModel: ObservableObject {
mentions: mentions.isEmpty ? nil : mentions,
)
// Add to main messages
// Add to main messages immediately for user feedback
messages.append(message)
trimMessagesIfNeeded()
// Force immediate UI update for user's own messages
objectWillChange.send()
// Send via mesh with mentions
meshService.sendMessage(content, mentions: mentions)
}
@@ -433,7 +445,7 @@ class ChatViewModel: ObservableObject {
let isFavorite = isFavorite(peerID: peerID)
DeliveryTracker.shared.trackMessage(message, recipientID: peerID, recipientNickname: recipientNickname, isFavorite: isFavorite)
// Trigger UI update
// Immediate UI update for user's own messages
objectWillChange.send()
// Send via mesh with the same message ID
@@ -583,16 +595,21 @@ class ChatViewModel: ObservableObject {
timestamp: Date(),
isRelay: false
)
messages.append(localNotification)
trimMessagesIfNeeded()
// System messages can be batched
addMessageToBatch(localNotification)
}
}
@objc private func appWillResignActive() {
// Flush any pending messages when app goes to background
flushMessageBatchImmediately()
userDefaults.synchronize()
}
@objc func applicationWillTerminate() {
// Flush any pending messages immediately
flushMessageBatchImmediately()
// Verify identity key is still there
_ = KeychainManager.shared.verifyIdentityKeyExists()
@@ -604,6 +621,9 @@ class ChatViewModel: ObservableObject {
}
@objc private func appWillTerminate() {
// Flush any pending messages immediately
flushMessageBatchImmediately()
userDefaults.synchronize()
}
@@ -707,6 +727,9 @@ class ChatViewModel: ObservableObject {
// PANIC: Emergency data clearing for activist safety
func panicClearAllData() {
// Flush any pending messages immediately before clearing
flushMessageBatchImmediately()
// Clear all messages
messages.removeAll()
privateChats.removeAll()
@@ -1280,6 +1303,82 @@ class ChatViewModel: ObservableObject {
}
}
// MARK: - Message Batching
private func addMessageToBatch(_ message: BitchatMessage) {
pendingMessages.append(message)
scheduleBatchFlush()
}
private func addPrivateMessageToBatch(_ message: BitchatMessage, for peerID: String) {
if pendingPrivateMessages[peerID] == nil {
pendingPrivateMessages[peerID] = []
}
pendingPrivateMessages[peerID]?.append(message)
scheduleBatchFlush()
}
private func scheduleBatchFlush() {
// Cancel existing timer
messageBatchTimer?.invalidate()
// Schedule new flush
messageBatchTimer = Timer.scheduledTimer(withTimeInterval: messageBatchInterval, repeats: false) { [weak self] _ in
self?.flushMessageBatch()
}
}
private func flushMessageBatch() {
DispatchQueue.main.async { [weak self] in
guard let self = self else { return }
// Process pending public messages
if !self.pendingMessages.isEmpty {
let messagesToAdd = self.pendingMessages
self.pendingMessages.removeAll()
// Add all messages at once
self.messages.append(contentsOf: messagesToAdd)
// Sort once after batch addition
self.messages.sort { $0.timestamp < $1.timestamp }
// Trim once if needed
self.trimMessagesIfNeeded()
}
// Process pending private messages
if !self.pendingPrivateMessages.isEmpty {
let privateMessageBatches = self.pendingPrivateMessages
self.pendingPrivateMessages.removeAll()
for (peerID, messagesToAdd) in privateMessageBatches {
if self.privateChats[peerID] == nil {
self.privateChats[peerID] = []
}
// Add all messages for this peer at once
self.privateChats[peerID]?.append(contentsOf: messagesToAdd)
// Sort once after batch addition
self.privateChats[peerID]?.sort { $0.timestamp < $1.timestamp }
// Trim once if needed
self.trimPrivateChatMessagesIfNeeded(for: peerID)
}
}
// Single UI update for all changes
self.objectWillChange.send()
}
}
// Force immediate flush for high-priority messages
private func flushMessageBatchImmediately() {
messageBatchTimer?.invalidate()
flushMessageBatch()
}
// Update encryption status in appropriate places, not during view updates
private func updateEncryptionStatus(for peerID: String) {
let noiseService = meshService.getNoiseService()
@@ -1897,16 +1996,11 @@ extension ChatViewModel: BitchatDelegate {
)
}
privateChats[peerID]?.append(messageToStore)
// Sort messages by timestamp to ensure proper ordering
privateChats[peerID]?.sort { $0.timestamp < $1.timestamp }
trimPrivateChatMessagesIfNeeded(for: peerID)
// Use batching for private messages
addPrivateMessageToBatch(messageToStore, for: peerID)
// Debug logging
// Trigger UI update for private chats
objectWillChange.send()
// Check if we're in a private chat with this peer's fingerprint
// This handles reconnections with new peer IDs
if let chatFingerprint = selectedPrivateChatFingerprint,
@@ -1974,10 +2068,7 @@ extension ChatViewModel: BitchatDelegate {
if finalMessage.sender != nickname && finalMessage.sender != "system" {
// Skip empty or whitespace-only messages
if !finalMessage.content.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
messages.append(finalMessage)
// Sort messages by timestamp to ensure proper ordering
messages.sort { $0.timestamp < $1.timestamp }
trimMessagesIfNeeded()
addMessageToBatch(finalMessage)
}
} else if finalMessage.sender != "system" {
// Our own message - check if we already have it (by ID and content)
@@ -1998,17 +2089,13 @@ extension ChatViewModel: BitchatDelegate {
// This is a message we sent from another device or it's missing locally
// Skip empty or whitespace-only messages
if !finalMessage.content.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
messages.append(finalMessage)
messages.sort { $0.timestamp < $1.timestamp }
trimMessagesIfNeeded()
addMessageToBatch(finalMessage)
}
}
} else {
// System message - check for empty content before adding
if !finalMessage.content.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
messages.append(finalMessage)
messages.sort { $0.timestamp < $1.timestamp }
trimMessagesIfNeeded()
addMessageToBatch(finalMessage)
}
}
}
@@ -2134,11 +2221,8 @@ extension ChatViewModel: BitchatDelegate {
isRelay: false,
originalSender: nil
)
messages.append(systemMessage)
trimMessagesIfNeeded()
// Force UI update
objectWillChange.send()
// Batch system messages
addMessageToBatch(systemMessage)
}
func didDisconnectFromPeer(_ peerID: String) {
@@ -2169,11 +2253,8 @@ extension ChatViewModel: BitchatDelegate {
isRelay: false,
originalSender: nil
)
messages.append(systemMessage)
trimMessagesIfNeeded()
// Force UI update
objectWillChange.send()
// Batch system messages
addMessageToBatch(systemMessage)
}
func didUpdatePeerList(_ peers: [String]) {