Add some performance metrics for Sentry (#5760)

- Add `AnalyticsService.startTransaction(...)` to start a logging transaction that can be uploaded to Sentry if the user enabled the analytics upload.
- Add `AnalyticsTransaction` wrapper to abstract the Sentry ones.
- Added several helper methods to improve the UX around these transactions.
- Then measure:
  - Time until the first sync, and how it ended.
  - Time until the first rooms are displayed.
  - Time to load a room or a preview.
  - Time to load a timeline.

appnav/src/main/kotlin/io/element/android/appnav/LoggedInFlowNode.kt

@@ -90,6 +90,8 @@ import io.element.android.libraries.matrix.api.verification.VerificationRequest
 import io.element.android.libraries.preferences.api.store.AppPreferencesStore
 import io.element.android.libraries.push.api.notifications.conversations.NotificationConversationService
 import io.element.android.libraries.ui.common.nodes.emptyNode
+import io.element.android.services.analytics.api.AnalyticsLongRunningTransaction
+import io.element.android.services.analytics.api.AnalyticsService
 import io.element.android.services.appnavstate.api.AppNavigationStateService
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.first
@@ -136,6 +138,7 @@ class LoggedInFlowNode(
     private val appPreferencesStore: AppPreferencesStore,
     private val buildMeta: BuildMeta,
     snackbarDispatcher: SnackbarDispatcher,
+    private val analyticsService: AnalyticsService,
 ) : BaseFlowNode<LoggedInFlowNode.NavTarget>(
     backstack = BackStack(
         initialElement = NavTarget.Placeholder,
@@ -212,6 +215,8 @@ class LoggedInFlowNode(
                     matrixClient.getMaxFileUploadSize()
                 }
 
+                analyticsService.startLongRunningTransaction(AnalyticsLongRunningTransaction.FirstRoomsDisplayed)
+
                 ftueService.state
                     .onEach { ftueState ->
                         when (ftueState) {

appnav/src/main/kotlin/io/element/android/appnav/di/SyncOrchestrator.kt

@@ -18,6 +18,8 @@ import io.element.android.libraries.core.coroutine.CoroutineDispatchers
 import io.element.android.libraries.core.coroutine.childScope
 import io.element.android.libraries.matrix.api.sync.SyncService
 import io.element.android.libraries.matrix.api.sync.SyncState
+import io.element.android.services.analytics.api.AnalyticsService
+import io.element.android.services.analytics.api.recordTransaction
 import io.element.android.services.appnavstate.api.AppForegroundStateService
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.FlowPreview
@@ -39,6 +41,7 @@ class SyncOrchestrator(
     private val appForegroundStateService: AppForegroundStateService,
     private val networkMonitor: NetworkMonitor,
     dispatchers: CoroutineDispatchers,
+    private val analyticsService: AnalyticsService,
 ) {
     @AssistedFactory
     interface Factory {
@@ -69,10 +72,13 @@ class SyncOrchestrator(
             // Perform an initial sync if the sync service is not running, to check whether the homeserver is accessible
             // Otherwise, if the device is offline the sync service will never start and the SyncState will be Idle, not Offline
             Timber.tag(tag).d("performing initial sync attempt")
-            syncService.startSync()
+            analyticsService.recordTransaction("First sync", "syncService.startSync()") { transaction ->
+                syncService.startSync()
 
-            // Wait until the sync service is not idle, either it will be running or in error/offline state
-            syncService.syncState.first { it != SyncState.Idle }
+                // Wait until the sync service is not idle, either it will be running or in error/offline state
+                val firstState = syncService.syncState.first { it != SyncState.Idle }
+                transaction.setData("first_sync_state", firstState.name)
+            }
 
             observeStates()
         }

appnav/src/test/kotlin/io/element/android/appnav/SyncOrchestratorTest.kt

@@ -13,6 +13,7 @@ import io.element.android.features.networkmonitor.api.NetworkStatus
 import io.element.android.features.networkmonitor.test.FakeNetworkMonitor
 import io.element.android.libraries.matrix.api.sync.SyncState
 import io.element.android.libraries.matrix.test.sync.FakeSyncService
+import io.element.android.services.analytics.test.FakeAnalyticsService
 import io.element.android.services.appnavstate.test.FakeAppForegroundStateService
 import io.element.android.tests.testutils.WarmUpRule
 import io.element.android.tests.testutils.lambda.lambdaRecorder
@@ -390,5 +391,6 @@ class SyncOrchestratorTest {
         networkMonitor = networkMonitor,
         appForegroundStateService = appForegroundStateService,
         dispatchers = testCoroutineDispatchers(),
+        analyticsService = FakeAnalyticsService(),
     )
 }

appnav/src/test/kotlin/io/element/android/appnav/di/MatrixSessionCacheTest.kt

@@ -15,6 +15,7 @@ import io.element.android.libraries.matrix.api.sync.SyncService
 import io.element.android.libraries.matrix.test.A_SESSION_ID
 import io.element.android.libraries.matrix.test.FakeMatrixClient
 import io.element.android.libraries.matrix.test.auth.FakeMatrixAuthenticationService
+import io.element.android.services.analytics.test.FakeAnalyticsService
 import io.element.android.services.appnavstate.test.FakeAppForegroundStateService
 import io.element.android.tests.testutils.testCoroutineDispatchers
 import kotlinx.coroutines.CoroutineScope
@@ -129,6 +130,7 @@ class MatrixSessionCacheTest {
                 appForegroundStateService = FakeAppForegroundStateService(),
                 networkMonitor = FakeNetworkMonitor(),
                 dispatchers = testCoroutineDispatchers(),
+                analyticsService = FakeAnalyticsService(),
             )
         }
     }

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/RustMatrixClient.kt

@@ -76,6 +76,7 @@ import io.element.android.libraries.matrix.impl.util.cancelAndDestroy
 import io.element.android.libraries.matrix.impl.util.mxCallbackFlow
 import io.element.android.libraries.matrix.impl.verification.RustSessionVerificationService
 import io.element.android.libraries.sessionstorage.api.SessionStore
+import io.element.android.services.analytics.api.AnalyticsService
 import io.element.android.services.toolbox.api.systemclock.SystemClock
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.persistentListOf
@@ -131,6 +132,7 @@ class RustMatrixClient(
     clock: SystemClock,
     timelineEventTypeFilterFactory: TimelineEventTypeFilterFactory,
     private val featureFlagService: FeatureFlagService,
+    private val analyticsService: AnalyticsService,
 ) : MatrixClient {
     override val sessionId: UserId = UserId(innerClient.userId())
     override val deviceId: DeviceId = DeviceId(innerClient.deviceId())
@@ -178,6 +180,7 @@ class RustMatrixClient(
         roomListFactory = RoomListFactory(
             innerRoomListService = innerRoomListService,
             sessionCoroutineScope = sessionCoroutineScope,
+            analyticsService = analyticsService,
         ),
         roomSyncSubscriber = roomSyncSubscriber,
     )
@@ -212,6 +215,7 @@ class RustMatrixClient(
         roomMembershipObserver = roomMembershipObserver,
         roomInfoMapper = roomInfoMapper,
         featureFlagService = featureFlagService,
+        analyticsService = analyticsService,
     )
 
     override val matrixMediaLoader: MatrixMediaLoader = RustMediaLoader(

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/RustMatrixClientFactory.kt

@@ -114,6 +114,7 @@ class RustMatrixClientFactory(
             clock = clock,
             timelineEventTypeFilterFactory = timelineEventTypeFilterFactory,
             featureFlagService = featureFlagService,
+            analyticsService = analyticsService,
         ).also {
             Timber.tag(it.toString()).d("Creating Client with access token '$anonymizedAccessToken' and refresh token '$anonymizedRefreshToken'")
         }

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/room/RustRoomFactory.kt

@@ -23,6 +23,9 @@ import io.element.android.libraries.matrix.api.roomlist.RoomListService
 import io.element.android.libraries.matrix.api.roomlist.awaitLoaded
 import io.element.android.libraries.matrix.impl.room.preview.RoomPreviewInfoMapper
 import io.element.android.libraries.matrix.impl.roomlist.roomOrNull
+import io.element.android.services.analytics.api.AnalyticsService
+import io.element.android.services.analytics.api.recordTransaction
+import io.element.android.services.analyticsproviders.api.recordChildTransaction
 import io.element.android.services.toolbox.api.systemclock.SystemClock
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.NonCancellable
@@ -54,6 +57,7 @@ class RustRoomFactory(
     private val featureFlagService: FeatureFlagService,
     private val roomMembershipObserver: RoomMembershipObserver,
     private val roomInfoMapper: RoomInfoMapper,
+    private val analyticsService: AnalyticsService,
 ) {
     private val dispatcher = dispatchers.io.limitedParallelism(1)
     private val mutex = Mutex()
@@ -106,48 +110,64 @@ class RustRoomFactory(
                 Timber.d("Room factory is destroyed, returning null for $roomId")
                 return@withContext null
             }
-            val sdkRoom = awaitRoomInRoomList(roomId) ?: return@withContext null
+
+            val sdkRoom = awaitRoomInRoomList(roomId) ?: return@withLock null
 
             if (sdkRoom.membership() == Membership.JOINED) {
-                val hideThreadedEvents = featureFlagService.isFeatureEnabled(FeatureFlags.Threads)
-                // Init the live timeline in the SDK from the Room
-                val timeline = sdkRoom.timelineWithConfiguration(
-                    TimelineConfiguration(
-                        focus = TimelineFocus.Live(hideThreadedEvents = hideThreadedEvents),
-                        filter = eventFilters?.let(TimelineFilter::EventTypeFilter) ?: TimelineFilter.All,
-                        internalIdPrefix = "live",
-                        dateDividerMode = DateDividerMode.DAILY,
-                        trackReadReceipts = true,
-                        reportUtds = true,
-                    )
-                )
+                analyticsService.recordTransaction(
+                    name = "Get joined room",
+                    operation = "RustRoomFactory.getJoinedRoomOrPreview",
+                ) { transaction ->
+                    val hideThreadedEvents = featureFlagService.isFeatureEnabled(FeatureFlags.Threads)
+                    // Init the live timeline in the SDK from the Room
+                    val timeline = transaction.recordChildTransaction(
+                        operation = "sdkRoom.timelineWithConfiguration",
+                        description = "Get timeline from the SDK",
+                    ) {
+                        sdkRoom.timelineWithConfiguration(
+                            TimelineConfiguration(
+                                focus = TimelineFocus.Live(hideThreadedEvents = hideThreadedEvents),
+                                filter = eventFilters?.let(TimelineFilter::EventTypeFilter) ?: TimelineFilter.All,
+                                internalIdPrefix = "live",
+                                dateDividerMode = DateDividerMode.DAILY,
+                                trackReadReceipts = true,
+                                reportUtds = true,
+                            )
+                        )
+                    }
 
-                GetRoomResult.Joined(
-                    JoinedRustRoom(
-                        baseRoom = getBaseRoom(sdkRoom),
-                        notificationSettingsService = notificationSettingsService,
-                        roomContentForwarder = roomContentForwarder,
-                        liveInnerTimeline = timeline,
-                        coroutineDispatchers = dispatchers,
-                        systemClock = systemClock,
-                        featureFlagService = featureFlagService,
+                    GetRoomResult.Joined(
+                        JoinedRustRoom(
+                            baseRoom = getBaseRoom(sdkRoom),
+                            notificationSettingsService = notificationSettingsService,
+                            roomContentForwarder = roomContentForwarder,
+                            liveInnerTimeline = timeline,
+                            coroutineDispatchers = dispatchers,
+                            systemClock = systemClock,
+                            featureFlagService = featureFlagService,
+                        )
                     )
-                )
-            } else {
-                val preview = try {
-                    sdkRoom.previewRoom(via = serverNames)
-                } catch (e: Exception) {
-                    Timber.e(e, "Failed to get room preview for $roomId")
-                    return@withContext null
                 }
+            } else {
+                analyticsService.recordTransaction(
+                    name = "Get preview of room",
+                    operation = "RustRoomFactory.getJoinedRoomOrPreview",
+                ) {
+                    val preview = try {
+                        sdkRoom.previewRoom(via = serverNames)
+                    } catch (e: Exception) {
+                        Timber.e(e, "Failed to get room preview for $roomId")
+                        return@recordTransaction null
+                    }
 
-                GetRoomResult.NotJoined(
-                    NotJoinedRustRoom(
-                        sessionId = sessionId,
-                        localRoom = getBaseRoom(sdkRoom),
-                        previewInfo = RoomPreviewInfoMapper.map(preview.info()),
+                    GetRoomResult.NotJoined(
+                        NotJoinedRustRoom(
+                            sessionId = sessionId,
+                            localRoom = getBaseRoom(sdkRoom),
+                            previewInfo = RoomPreviewInfoMapper.map(preview.info()),
+                        )
                     )
-                )
+                }
             }
         }
     }

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/roomlist/RoomListFactory.kt

@@ -12,6 +12,8 @@ import io.element.android.libraries.matrix.api.roomlist.DynamicRoomList
 import io.element.android.libraries.matrix.api.roomlist.RoomList
 import io.element.android.libraries.matrix.api.roomlist.RoomListFilter
 import io.element.android.libraries.matrix.api.roomlist.RoomSummary
+import io.element.android.services.analytics.api.AnalyticsLongRunningTransaction
+import io.element.android.services.analytics.api.AnalyticsService
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -36,6 +38,7 @@ private val ROOM_LIST_RUST_FILTERS = listOf(
 internal class RoomListFactory(
     private val innerRoomListService: RoomListService,
     private val sessionCoroutineScope: CoroutineScope,
+    private val analyticsService: AnalyticsService,
 ) {
     private val roomSummaryDetailsFactory: RoomSummaryFactory = RoomSummaryFactory()
 
@@ -59,6 +62,8 @@ internal class RoomListFactory(
         val loadedPages = MutableStateFlow(1)
         var innerRoomList: InnerRoomList? = null
 
+        val firstRoomsTransaction = analyticsService.startTransaction("Load first set of rooms", "innerRoomList.entriesFlow")
+
         coroutineScope.launch(coroutineContext) {
             innerRoomList = innerProvider()
             innerRoomList.let { innerRoomList ->
@@ -67,6 +72,10 @@ internal class RoomListFactory(
                     roomListDynamicEvents = dynamicEvents,
                     initialFilterKind = RoomListEntriesDynamicFilterKind.All(ROOM_LIST_RUST_FILTERS),
                 ).onEach { update ->
+                    if (!firstRoomsTransaction.isFinished()) {
+                        analyticsService.stopLongRunningTransaction(AnalyticsLongRunningTransaction.FirstRoomsDisplayed)
+                        firstRoomsTransaction.finish()
+                    }
                     processor.postUpdate(update)
                 }.launchIn(this)
 

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/sync/RustSyncService.kt

@@ -30,7 +30,7 @@ import org.matrix.rustcomponents.sdk.SyncService as InnerSyncService
 class RustSyncService(
     private val inner: InnerSyncService,
     private val dispatcher: CoroutineDispatcher,
-    sessionCoroutineScope: CoroutineScope
+    sessionCoroutineScope: CoroutineScope,
 ) : SyncService {
     private val isServiceReady = AtomicBoolean(true)
 
@@ -71,10 +71,10 @@ class RustSyncService(
     override val syncState: StateFlow<SyncState> =
         inner.stateFlow()
             .map(SyncServiceState::toSyncState)
+            .distinctUntilChanged()
             .onEach { state ->
                 Timber.i("Sync state=$state")
             }
-            .distinctUntilChanged()
             .stateIn(sessionCoroutineScope, SharingStarted.Eagerly, SyncState.Idle)
 
     override val isOnline: StateFlow<Boolean> = syncState.mapState { it != SyncState.Offline }

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/timeline/item/event/TimelineEventContentMapper.kt

@@ -210,7 +210,7 @@ private fun RustOtherState.map(): OtherState {
         RustOtherState.RoomEncryption -> OtherState.RoomEncryption
         RustOtherState.RoomGuestAccess -> OtherState.RoomGuestAccess
         RustOtherState.RoomHistoryVisibility -> OtherState.RoomHistoryVisibility
-        RustOtherState.RoomJoinRules -> OtherState.RoomJoinRules
+        is RustOtherState.RoomJoinRules -> OtherState.RoomJoinRules
         is RustOtherState.RoomName -> OtherState.RoomName(name)
         is RustOtherState.RoomPinnedEvents -> OtherState.RoomPinnedEvents(change.map())
         is RustOtherState.RoomPowerLevels -> OtherState.RoomUserPowerLevels(users)

libraries/matrix/impl/src/test/kotlin/io/element/android/libraries/matrix/impl/RustMatrixClientTest.kt

@@ -22,6 +22,7 @@ import io.element.android.libraries.matrix.test.A_USER_NAME
 import io.element.android.libraries.sessionstorage.api.SessionStore
 import io.element.android.libraries.sessionstorage.test.InMemorySessionStore
 import io.element.android.libraries.sessionstorage.test.aSessionData
+import io.element.android.services.analytics.test.FakeAnalyticsService
 import io.element.android.services.toolbox.test.systemclock.FakeSystemClock
 import io.element.android.tests.testutils.lambda.lambdaRecorder
 import io.element.android.tests.testutils.lambda.value
@@ -116,5 +117,6 @@ class RustMatrixClientTest {
         clock = FakeSystemClock(),
         timelineEventTypeFilterFactory = FakeTimelineEventTypeFilterFactory(),
         featureFlagService = FakeFeatureFlagService(),
+        analyticsService = FakeAnalyticsService(),
     )
 }

libraries/matrix/impl/src/test/kotlin/io/element/android/libraries/matrix/impl/roomlist/RoomListFactoryTest.kt

@@ -10,6 +10,7 @@ package io.element.android.libraries.matrix.impl.roomlist
 
 import io.element.android.libraries.matrix.impl.fixtures.fakes.FakeFfiRoomList
 import io.element.android.libraries.matrix.impl.fixtures.fakes.FakeFfiRoomListService
+import io.element.android.services.analytics.test.FakeAnalyticsService
 import kotlinx.coroutines.test.runTest
 import org.junit.Ignore
 import org.junit.Test
@@ -22,6 +23,7 @@ class RoomListFactoryTest {
         val sut = RoomListFactory(
             innerRoomListService = FakeFfiRoomListService(),
             sessionCoroutineScope = backgroundScope,
+            analyticsService = FakeAnalyticsService(),
         )
         sut.createRoomList(
             pageSize = 10,

libraries/matrix/impl/src/test/kotlin/io/element/android/libraries/matrix/impl/roomlist/RustBaseRoomListServiceTest.kt

@@ -12,6 +12,7 @@ import com.google.common.truth.Truth.assertThat
 import io.element.android.libraries.matrix.api.roomlist.RoomListService
 import io.element.android.libraries.matrix.impl.fixtures.fakes.FakeFfiRoomListService
 import io.element.android.libraries.matrix.impl.room.RoomSyncSubscriber
+import io.element.android.services.analytics.test.FakeAnalyticsService
 import io.element.android.tests.testutils.testCoroutineDispatchers
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.test.StandardTestDispatcher
@@ -52,6 +53,7 @@ private fun TestScope.createRustRoomListService(
     roomListFactory = RoomListFactory(
         innerRoomListService = roomListService,
         sessionCoroutineScope = backgroundScope,
+        analyticsService = FakeAnalyticsService(),
     ),
     roomSyncSubscriber = RoomSyncSubscriber(
         roomListService = roomListService,

services/analytics/api/src/main/kotlin/io/element/android/services/analytics/api/AnalyticsLongRunningTransaction.kt

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.services.analytics.api
+
+sealed class AnalyticsLongRunningTransaction(
+    val name: String,
+    val operation: String?,
+) {
+    data object FirstRoomsDisplayed : AnalyticsLongRunningTransaction("First rooms displayed after login or restoration", null)
+}

services/analytics/api/src/main/kotlin/io/element/android/services/analytics/api/AnalyticsService.kt

@@ -9,6 +9,7 @@
 package io.element.android.services.analytics.api
 
 import io.element.android.services.analyticsproviders.api.AnalyticsProvider
+import io.element.android.services.analyticsproviders.api.AnalyticsTransaction
 import io.element.android.services.analyticsproviders.api.trackers.AnalyticsTracker
 import io.element.android.services.analyticsproviders.api.trackers.ErrorTracker
 import kotlinx.coroutines.flow.Flow
@@ -48,4 +49,23 @@ interface AnalyticsService : AnalyticsTracker, ErrorTracker {
      * Update analyticsId from the AccountData.
      */
     suspend fun setAnalyticsId(analyticsId: String)
+
+    /**
+     * Starts a transaction to measure the performance of an operation.
+     */
+    fun startTransaction(name: String, operation: String? = null): AnalyticsTransaction
+
+    fun startLongRunningTransaction(longRunningTransaction: AnalyticsLongRunningTransaction)
+
+    fun stopLongRunningTransaction(longRunningTransaction: AnalyticsLongRunningTransaction)
+}
+
+inline fun <T> AnalyticsService.recordTransaction(name: String, operation: String, block: (AnalyticsTransaction) -> T): T {
+    val transaction = startTransaction(name, operation)
+    try {
+        val result = block(transaction)
+        return result
+    } finally {
+        transaction.finish()
+    }
 }

services/analytics/api/src/main/kotlin/io/element/android/services/analytics/api/NoopAnalyticsTransaction.kt

@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.services.analytics.api
+
+import io.element.android.services.analyticsproviders.api.AnalyticsTransaction
+
+object NoopAnalyticsTransaction : AnalyticsTransaction {
+    override fun startChild(operation: String, description: String?): AnalyticsTransaction = NoopAnalyticsTransaction
+    override fun setData(key: String, value: Any) {}
+    override fun isFinished(): Boolean = true
+    override fun finish() {}
+}

services/analytics/impl/src/main/kotlin/io/element/android/services/analytics/impl/DefaultAnalyticsService.kt

@@ -19,15 +19,19 @@ import im.vector.app.features.analytics.plan.UserProperties
 import io.element.android.libraries.di.annotations.AppCoroutineScope
 import io.element.android.libraries.sessionstorage.api.observer.SessionListener
 import io.element.android.libraries.sessionstorage.api.observer.SessionObserver
+import io.element.android.services.analytics.api.AnalyticsLongRunningTransaction
 import io.element.android.services.analytics.api.AnalyticsService
+import io.element.android.services.analytics.api.NoopAnalyticsTransaction
 import io.element.android.services.analytics.impl.log.analyticsTag
 import io.element.android.services.analytics.impl.store.AnalyticsStore
 import io.element.android.services.analyticsproviders.api.AnalyticsProvider
+import io.element.android.services.analyticsproviders.api.AnalyticsTransaction
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
 import timber.log.Timber
+import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.atomic.AtomicBoolean
 
 @SingleIn(AppScope::class)
@@ -40,6 +44,8 @@ class DefaultAnalyticsService(
     private val coroutineScope: CoroutineScope,
     private val sessionObserver: SessionObserver,
 ) : AnalyticsService, SessionListener {
+    private val pendingLongRunningTransactions = ConcurrentHashMap<AnalyticsLongRunningTransaction, AnalyticsTransaction>()
+
     // Cache for the store values
     private val userConsent = AtomicBoolean(false)
 
@@ -138,4 +144,20 @@ class DefaultAnalyticsService(
             analyticsProviders.onEach { it.trackError(throwable) }
         }
     }
+
+    override fun startTransaction(name: String, operation: String?): AnalyticsTransaction {
+        return if (userConsent.get()) {
+            analyticsProviders.firstNotNullOfOrNull { it.startTransaction(name, operation) }
+        } else {
+            null
+        } ?: NoopAnalyticsTransaction
+    }
+
+    override fun startLongRunningTransaction(longRunningTransaction: AnalyticsLongRunningTransaction) {
+        pendingLongRunningTransactions[longRunningTransaction] = startTransaction(longRunningTransaction.name, longRunningTransaction.operation)
+    }
+
+    override fun stopLongRunningTransaction(longRunningTransaction: AnalyticsLongRunningTransaction) {
+        pendingLongRunningTransactions.remove(longRunningTransaction)?.finish()
+    }
 }

services/analytics/noop/src/main/kotlin/io/element/android/services/analytics/noop/NoopAnalyticsService.kt

@@ -15,8 +15,11 @@ import im.vector.app.features.analytics.itf.VectorAnalyticsEvent
 import im.vector.app.features.analytics.itf.VectorAnalyticsScreen
 import im.vector.app.features.analytics.plan.SuperProperties
 import im.vector.app.features.analytics.plan.UserProperties
+import io.element.android.services.analytics.api.AnalyticsLongRunningTransaction
 import io.element.android.services.analytics.api.AnalyticsService
+import io.element.android.services.analytics.api.NoopAnalyticsTransaction
 import io.element.android.services.analyticsproviders.api.AnalyticsProvider
+import io.element.android.services.analyticsproviders.api.AnalyticsTransaction
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.flowOf
 
@@ -35,4 +38,7 @@ class NoopAnalyticsService : AnalyticsService {
     override fun updateUserProperties(userProperties: UserProperties) = Unit
     override fun trackError(throwable: Throwable) = Unit
     override fun updateSuperProperties(updatedProperties: SuperProperties) = Unit
+    override fun startTransaction(name: String, operation: String?): AnalyticsTransaction = NoopAnalyticsTransaction
+    override fun startLongRunningTransaction(longRunningTransaction: AnalyticsLongRunningTransaction) {}
+    override fun stopLongRunningTransaction(longRunningTransaction: AnalyticsLongRunningTransaction) {}
 }

services/analytics/test/src/main/kotlin/io/element/android/services/analytics/test/FakeAnalyticsService.kt

@@ -12,8 +12,11 @@ import im.vector.app.features.analytics.itf.VectorAnalyticsEvent
 import im.vector.app.features.analytics.itf.VectorAnalyticsScreen
 import im.vector.app.features.analytics.plan.SuperProperties
 import im.vector.app.features.analytics.plan.UserProperties
+import io.element.android.services.analytics.api.AnalyticsLongRunningTransaction
 import io.element.android.services.analytics.api.AnalyticsService
+import io.element.android.services.analytics.api.NoopAnalyticsTransaction
 import io.element.android.services.analyticsproviders.api.AnalyticsProvider
+import io.element.android.services.analyticsproviders.api.AnalyticsTransaction
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.asStateFlow
@@ -65,4 +68,8 @@ class FakeAnalyticsService(
     override fun updateSuperProperties(updatedProperties: SuperProperties) {
         // No op
     }
+
+    override fun startTransaction(name: String, operation: String?): AnalyticsTransaction = NoopAnalyticsTransaction
+    override fun startLongRunningTransaction(longRunningTransaction: AnalyticsLongRunningTransaction) {}
+    override fun stopLongRunningTransaction(longRunningTransaction: AnalyticsLongRunningTransaction) {}
 }

services/analyticsproviders/api/src/main/kotlin/io/element/android/services/analyticsproviders/api/AnalyticsProvider.kt

@@ -20,4 +20,6 @@ interface AnalyticsProvider : AnalyticsTracker, ErrorTracker {
     fun init()
 
     fun stop()
+
+    fun startTransaction(name: String, operation: String? = null): AnalyticsTransaction?
 }

services/analyticsproviders/api/src/main/kotlin/io/element/android/services/analyticsproviders/api/AnalyticsTransaction.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.services.analyticsproviders.api
+
+interface AnalyticsTransaction {
+    fun startChild(operation: String, description: String? = null): AnalyticsTransaction
+    fun setData(key: String, value: Any)
+    fun isFinished(): Boolean
+    fun finish()
+}
+
+inline fun <T> AnalyticsTransaction.recordChildTransaction(operation: String, description: String? = null, block: (AnalyticsTransaction) -> T): T {
+    val child = startChild(operation, description)
+    try {
+        val result = block(child)
+        return result
+    } finally {
+        child.finish()
+    }
+}

services/analyticsproviders/posthog/src/main/kotlin/io/element/android/services/analyticsproviders/posthog/PosthogAnalyticsProvider.kt

@@ -17,6 +17,7 @@ import im.vector.app.features.analytics.itf.VectorAnalyticsScreen
 import im.vector.app.features.analytics.plan.SuperProperties
 import im.vector.app.features.analytics.plan.UserProperties
 import io.element.android.services.analyticsproviders.api.AnalyticsProvider
+import io.element.android.services.analyticsproviders.api.AnalyticsTransaction
 import io.element.android.services.analyticsproviders.posthog.log.analyticsTag
 import timber.log.Timber
 
@@ -122,6 +123,8 @@ class PosthogAnalyticsProvider(
         }
         return withSuperProperties.takeIf { it.isEmpty().not() }
     }
+
+    override fun startTransaction(name: String, operation: String?): AnalyticsTransaction? = null
 }
 
 private fun Map<String, Any?>.keepOnlyNonNullValues(): Map<String, Any> {

services/analyticsproviders/sentry/src/main/kotlin/io/element/android/services/analyticsproviders/sentry/SentryAnalyticsProvider.kt

@@ -20,6 +20,7 @@ import io.element.android.libraries.core.meta.BuildMeta
 import io.element.android.libraries.core.meta.BuildType
 import io.element.android.libraries.di.annotations.ApplicationContext
 import io.element.android.services.analyticsproviders.api.AnalyticsProvider
+import io.element.android.services.analyticsproviders.api.AnalyticsTransaction
 import io.element.android.services.analyticsproviders.sentry.log.analyticsTag
 import io.sentry.Breadcrumb
 import io.sentry.Sentry
@@ -51,6 +52,7 @@ class SentryAnalyticsProvider(
             options.isEnableUserInteractionTracing = true
             options.environment = buildMeta.buildType.toSentryEnv()
         }
+        Timber.tag(analyticsTag.value).d("Sentry was initialized correctly")
     }
 
     override fun stop() {
@@ -87,6 +89,10 @@ class SentryAnalyticsProvider(
     override fun trackError(throwable: Throwable) {
         Sentry.captureException(throwable)
     }
+
+    override fun startTransaction(name: String, operation: String?): AnalyticsTransaction? {
+        return SentryAnalyticsTransaction(name, operation)
+    }
 }
 
 private fun BuildType.toSentryEnv() = when (this) {

services/analyticsproviders/sentry/src/main/kotlin/io/element/android/services/analyticsproviders/sentry/SentryAnalyticsTransaction.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.services.analyticsproviders.sentry
+
+import io.element.android.services.analyticsproviders.api.AnalyticsTransaction
+import io.sentry.ISpan
+import io.sentry.Sentry
+
+class SentryAnalyticsTransaction private constructor(span: ISpan) : AnalyticsTransaction {
+    constructor(name: String, operation: String?) : this(Sentry.startTransaction(name, operation.orEmpty()))
+    private val inner = span
+
+    override fun startChild(operation: String, description: String?): AnalyticsTransaction = SentryAnalyticsTransaction(
+        inner.startChild(operation, description)
+    )
+    override fun setData(key: String, value: Any) = inner.setData(key, value)
+    override fun isFinished(): Boolean = inner.isFinished
+    override fun finish() = inner.finish()
+}

services/analyticsproviders/test/src/main/kotlin/io/element/android/services/analyticsproviders/test/FakeAnalyticsProvider.kt

@@ -13,6 +13,7 @@ import im.vector.app.features.analytics.itf.VectorAnalyticsScreen
 import im.vector.app.features.analytics.plan.SuperProperties
 import im.vector.app.features.analytics.plan.UserProperties
 import io.element.android.services.analyticsproviders.api.AnalyticsProvider
+import io.element.android.services.analyticsproviders.api.AnalyticsTransaction
 import io.element.android.tests.testutils.lambda.lambdaError
 
 class FakeAnalyticsProvider(
@@ -32,4 +33,5 @@ class FakeAnalyticsProvider(
     override fun updateUserProperties(userProperties: UserProperties) = updateUserPropertiesLambda(userProperties)
     override fun trackError(throwable: Throwable) = trackErrorLambda(throwable)
     override fun updateSuperProperties(updatedProperties: SuperProperties) = updateSuperPropertiesLambda(updatedProperties)
+    override fun startTransaction(name: String, operation: String?): AnalyticsTransaction? = null
 }