feat: Optimize startup timings by delaying heavy tasts

src/app/domain/authentication/services/AuthService.ts

@@ -2,6 +2,7 @@ import { Linking } from 'react-native'
 
 import type CozyClient from 'cozy-client'
 import Minilog from 'cozy-minilog'
+import PouchLink from 'cozy-pouch-link'
 
 import { asyncLogoutNoClient } from '/app/domain/authentication/utils/asyncLogoutNoClient'
 
@@ -28,8 +29,29 @@ export const handleSupportEmail = (): void => {
   }
 }
 
+const handleLogin = (): void => {
+  try {
+    authLogger.info('Debounce replication')
+    if (clientInstance === null) throw new Error('No client instance set')
+
+    const pouchLink = getPouchLink(clientInstance)
+    pouchLink?.startReplicationWithDebounce()
+  } catch (error) {
+    authLogger.error('Error while handling login', error)
+  }
+}
+
 export const startListening = (client: CozyClient): void => {
   authLogger.info('Start listening to cozy-client events')
   clientInstance = client
   clientInstance.on('revoked', handleTokenError)
+  clientInstance.on('login', handleLogin)
+}
+
+const getPouchLink = (client?: CozyClient): PouchLink | null => {
+  if (!client) {
+    return null
+  }
+  // eslint-disable-next-line @typescript-eslint/no-unsafe-return
+  return client.links.find(link => link instanceof PouchLink) || null
 }

src/app/domain/authentication/services/SynchronizeService.spec.ts

@@ -11,6 +11,9 @@ const {
   synchronizeOnInit
 } = SynchronizeService
 
+// @ts-expect-error TS see this as a const but we can edit it on tests runtime
+SynchronizeService.SYNCHRONIZE_DELAY_IN_MS = 0
+
 jest.mock('cozy-client')
 
 describe('SynchronizeService', () => {

src/app/domain/authentication/services/SynchronizeService.ts

@@ -1,4 +1,4 @@
 import Minilog from 'cozy-minilog'
 import { getDeviceName } from 'react-native-device-info'
 
 import type CozyClient from 'cozy-client'
@@ -9,6 +9,8 @@
 
 export const syncLog = Minilog('📱 SynchronizeService')
 
+export const SYNCHRONIZE_DELAY_IN_MS = 10 * 1000
+
 export const synchronizeDevice = async (client: CozyClient): Promise<void> => {
   try {
     await client.getStackClient().fetchJSON('POST', '/settings/synchronized')
@@ -50,6 +52,12 @@
 }
 
 export const synchronizeOnInit = async (client: CozyClient): Promise<void> => {
-  await checkClientName(client)
-  await synchronizeDevice(client)
+  return new Promise(resolve => {
+    // eslint-disable-next-line @typescript-eslint/no-misused-promises
+    setTimeout(async (): Promise<void> => {
+      await checkClientName(client)
+      await synchronizeDevice(client)
+      resolve()
+    }, SYNCHRONIZE_DELAY_IN_MS)
+  })
 }

src/app/domain/io.cozy.files/importantFiles.ts

@@ -15,7 +15,7 @@ import { getErrorMessage } from '/libs/functions/getErrorMessage'
 
 const log = Minilog('📁 Offline Files')
 
-const IMPORTANT_FILES_DOWNLOAD_DELAY_IN_MS = 100
+const IMPORTANT_FILES_DOWNLOAD_DELAY_IN_MS = 30 * 1000
 const NB_OF_MONTH_BEFORE_EXPIRATION = 1
 
 export const makeImportantFilesAvailableOfflineInBackground = (

src/hooks/useAppBootstrap.js

@@ -25,6 +25,8 @@ import { useHomeStateContext } from '/screens/home/HomeStateProvider'
 
 const log = Minilog('useAppBootstrap')
 
+const MANAGE_ICON_CACHE_DELAY_IN_MS = 30 * 1000
+
 export const useAppBootstrap = client => {
   const [markName] = useState(() => rnperformance.mark('useAppBootstrap'))
   const [initialRoute, setInitialRoute] = useState('fetching')
@@ -176,7 +178,8 @@ export const useAppBootstrap = client => {
       return
     }
 
-    client && manageIconCache(client)
+    client &&
+      setTimeout(() => manageIconCache(client), MANAGE_ICON_CACHE_DELAY_IN_MS)
     client && setSentryTag(SentryCustomTags.Instance, client.stackClient?.uri)
 
     const subscription = Linking.addEventListener('url', ({ url }) => {

src/pouchdb/getLinks.ts

@@ -12,6 +12,9 @@ import { default as PouchLink } from 'cozy-pouch-link'
 
 const log = Minilog('🔗 GetLinks')
 
+export const REPLICATION_DEBOUNCE = 30 * 1000 // 30s
+export const REPLICATION_DEBOUNCE_MAX_DELAY = 600 * 1000 // 10min
+
 export const offlineDoctypes = [
   // cozy-home
   'io.cozy.accounts',
@@ -37,8 +40,10 @@ export const offlineDoctypes = [
 export const getLinks = (): CozyLink[] => {
   const pouchLinkOptions = {
     doctypes: offlineDoctypes,
-    initialSync: true,
-    periodicSync: true,
+    initialSync: false,
+    periodicSync: false,
+    syncDebounceDelayInMs: REPLICATION_DEBOUNCE,
+    syncDebounceMaxDelayInMs: REPLICATION_DEBOUNCE_MAX_DELAY,
     platform: platformReactNative,
     ignoreWarmup: true,
     doctypesReplicationOptions: Object.fromEntries(