diff --git a/core/local/channel_watcher/add_checksum.js b/core/local/channel_watcher/add_checksum.js
index 3e196813d..06c49eb74 100644
--- a/core/local/channel_watcher/add_checksum.js
+++ b/core/local/channel_watcher/add_checksum.js
@@ -18,6 +18,7 @@ const _ = require('lodash')
 const path = require('path')
 
 const { logger } = require('../../utils/logger')
+const measureTime = require('../../utils/perfs')
 
 const STEP_NAME = 'addChecksum'
 
@@ -56,6 +57,8 @@ function loop(
   const syncPath = opts.config.syncPath
 
   return channel.asyncMap(async events => {
+    const stopMeasure = measureTime('LocalWatcher#addChecksumStep')
+
     for (const event of events) {
       try {
         if (event.incomplete) {
@@ -74,6 +77,8 @@ function loop(
         log.debug('Cannot compute checksum', { err, event })
       }
     }
+
+    stopMeasure()
     return events
   }, opts.fatal)
 }
diff --git a/core/local/channel_watcher/add_infos.js b/core/local/channel_watcher/add_infos.js
index b812182f4..6380f901f 100644
--- a/core/local/channel_watcher/add_infos.js
+++ b/core/local/channel_watcher/add_infos.js
@@ -13,6 +13,7 @@ const path = require('path')
 
 const { kind } = require('../../metadata')
 const { logger } = require('../../utils/logger')
+const measureTime = require('../../utils/perfs')
 const stater = require('../stater')
 
 const STEP_NAME = 'addInfos'
@@ -47,6 +48,8 @@ function loop(
   const syncPath = opts.config.syncPath
 
   return channel.asyncMap(async events => {
+    const stopMeasure = measureTime('LocalWatcher#addInfosStep')
+
     const batch = []
     for (const event of events) {
       if (event.kind === 'symlink') {
@@ -94,6 +97,8 @@ function loop(
       }
       batch.push(event)
     }
+
+    stopMeasure()
     return batch
   }, opts.fatal)
 }
diff --git a/core/local/channel_watcher/await_write_finish.js b/core/local/channel_watcher/await_write_finish.js
index d0af0dde7..c09b89a52 100644
--- a/core/local/channel_watcher/await_write_finish.js
+++ b/core/local/channel_watcher/await_write_finish.js
@@ -12,6 +12,7 @@ const _ = require('lodash')
 
 const Channel = require('./channel')
 const { logger } = require('../../utils/logger')
+const measureTime = require('../../utils/perfs')
 
 const STEP_NAME = 'awaitWriteFinish'
 
@@ -245,17 +246,21 @@ async function awaitWriteFinish(channel /*: Channel */, out /*: Channel */) {
 
   // eslint-disable-next-line no-constant-condition
   while (true) {
-    const events = aggregateBatch(await channel.pop())
-    let nbCandidates = countFileWriteEvents(events)
-    debounce(waiting, events)
+    const events = await channel.pop()
+    const stopMeasure = measureTime('LocalWatcher#awaitWriteFinishStep')
+
+    const aggregatedEvents = aggregateBatch(events)
+    let nbCandidates = countFileWriteEvents(aggregatedEvents)
+    debounce(waiting, aggregatedEvents)
 
     // Push the new batch of events in the queue
     const timeout = setTimeout(() => {
       out.push(waiting.shift().events)
       sendReadyBatches(waiting, out)
     }, DELAY)
-    waiting.push({ events, nbCandidates, timeout })
+    waiting.push({ events: aggregatedEvents, nbCandidates, timeout })
 
+    stopMeasure()
     // Look if some batches can be sent without waiting
     sendReadyBatches(waiting, out)
   }
diff --git a/core/local/channel_watcher/dispatch.js b/core/local/channel_watcher/dispatch.js
index d61cb3c32..a0b40a0cb 100644
--- a/core/local/channel_watcher/dispatch.js
+++ b/core/local/channel_watcher/dispatch.js
@@ -12,6 +12,7 @@ const _ = require('lodash')
 const { buildDir, buildFile } = require('../../metadata')
 const { WINDOWS_DATE_MIGRATION_FLAG } = require('../../config')
 const { logger } = require('../../utils/logger')
+const measureTime = require('../../utils/perfs')
 
 const STEP_NAME = 'dispatch'
 const component = `ChannelWatcher/${STEP_NAME}`
@@ -79,6 +80,8 @@ function loop(
 
 function step(opts /*: DispatchOptions */) {
   return async (batch /*: ChannelBatch */) => {
+    const stopMeasure = measureTime('LocalWatcher#dispatchStep')
+
     const { [STEP_NAME]: dispatchState } = opts.state
 
     clearTimeout(dispatchState.localEndTimeout)
@@ -96,6 +99,7 @@ function step(opts /*: DispatchOptions */) {
       opts.events.emit('local-end')
     }, LOCAL_END_NOTIFICATION_DELAY)
 
+    stopMeasure()
     return batch
   }
 }
diff --git a/core/local/channel_watcher/filter_ignored.js b/core/local/channel_watcher/filter_ignored.js
index fe661a148..56431a0d2 100644
--- a/core/local/channel_watcher/filter_ignored.js
+++ b/core/local/channel_watcher/filter_ignored.js
@@ -12,6 +12,7 @@
 const _ = require('lodash')
 
 const { logger } = require('../../utils/logger')
+const measureTime = require('../../utils/perfs')
 
 /*::
 import type Channel from './channel'
@@ -41,6 +42,8 @@ function loop(
     })
 
   return channel.map(events => {
+    const stopMeasure = measureTime('LocalWatcher#filterIgnoredStep')
+
     const batch = []
 
     for (const event of events) {
@@ -53,6 +56,7 @@ function loop(
       }
     }
 
+    stopMeasure()
     return batch
   }, opts.fatal)
 }
diff --git a/core/local/channel_watcher/incomplete_fixer.js b/core/local/channel_watcher/incomplete_fixer.js
index cd1d840e2..893049d2d 100644
--- a/core/local/channel_watcher/incomplete_fixer.js
+++ b/core/local/channel_watcher/incomplete_fixer.js
@@ -17,6 +17,7 @@ const path = require('path')
 
 const stater = require('../stater')
 const { logger } = require('../../utils/logger')
+const measureTime = require('../../utils/perfs')
 
 const STEP_NAME = 'incompleteFixer'
 
@@ -209,6 +210,8 @@ function step(
   opts /*: IncompleteFixerOptions */
 ) {
   return async (events /*: ChannelBatch */) /*: Promise<ChannelBatch> */ => {
+    const stopMeasure = measureTime('LocalWatcher#incompleteFixerStep')
+
     const batch = new Set()
 
     // Filter incomplete events
@@ -320,6 +323,7 @@ function step(
       state.incompletes.push(...incompletes)
     }
 
+    stopMeasure()
     return Array.from(batch)
   }
 }
diff --git a/core/local/channel_watcher/initial_diff.js b/core/local/channel_watcher/initial_diff.js
index e1ff1ba71..b0c6773ca 100644
--- a/core/local/channel_watcher/initial_diff.js
+++ b/core/local/channel_watcher/initial_diff.js
@@ -15,6 +15,7 @@ const path = require('path')
 const { WINDOWS_DATE_MIGRATION_FLAG } = require('../../config')
 const { kind } = require('../../metadata')
 const { logger } = require('../../utils/logger')
+const measureTime = require('../../utils/perfs')
 const Channel = require('./channel')
 
 /*::
@@ -82,6 +83,8 @@ function loop(
 async function initialState(
   opts /*: { pouch: Pouch } */
 ) /*: Promise<InitialDiffState> */ {
+  const stopMeasure = measureTime('LocalWatcher#initialDiffInitialState')
+
   const waiting /*: WaitingItem[] */ = []
   const renamedEvents /*: ChannelEvent[] */ = []
   const scannedPaths /*: Set<string> */ = new Set()
@@ -98,6 +101,7 @@ async function initialState(
     }
   }
 
+  stopMeasure()
   return {
     [STEP_NAME]: {
       waiting,
@@ -152,6 +156,8 @@ async function initialDiff(
       continue
     }
 
+    const stopMeasure = measureTime('LocalWatcher#initialDiffStep')
+
     let nbCandidates = 0
 
     debounce(waiting, events)
@@ -247,6 +253,8 @@ async function initialDiff(
         clearState(state)
       }
       batch.push(event)
+
+      stopMeasure()
     }
 
     // Push the new batch of events in the queue
diff --git a/core/local/channel_watcher/overwrite.js b/core/local/channel_watcher/overwrite.js
index 47497c8e0..16af1c2b2 100644
--- a/core/local/channel_watcher/overwrite.js
+++ b/core/local/channel_watcher/overwrite.js
@@ -8,6 +8,7 @@ const _ = require('lodash')
 
 const Channel = require('./channel')
 const { logger } = require('../../utils/logger')
+const measureTime = require('../../utils/perfs')
 
 /*::
 import type { ChannelEvent, ChannelBatch } from './event'
@@ -161,6 +162,8 @@ const _loop = async (channel, out, opts) => {
   // eslint-disable-next-line no-constant-condition
   while (true) {
     const events = await channel.pop()
+    const stopMeasure = measureTime('LocalWatcher#overwriteStep')
+
     const {
       state: { [STEP_NAME]: state }
     } = opts
@@ -168,6 +171,7 @@ const _loop = async (channel, out, opts) => {
     await step(events, opts)
 
     rotateState(state, events, output)
+    stopMeasure()
   }
 }
 
diff --git a/core/local/channel_watcher/parcel_producer.js b/core/local/channel_watcher/parcel_producer.js
index 4584e2230..3af483c65 100644
--- a/core/local/channel_watcher/parcel_producer.js
+++ b/core/local/channel_watcher/parcel_producer.js
@@ -11,6 +11,7 @@ const parcel = require('@parcel/watcher')
 const Channel = require('./channel')
 const { INITIAL_SCAN_DONE } = require('./event')
 const { logger } = require('../../utils/logger')
+const measureTime = require('../../utils/perfs')
 
 /*::
 import type { Config } from '../../config'
@@ -98,6 +99,9 @@ class Producer {
    *   events for its content in that case).
    */
   async start() {
+    const stopParcelSubscribeMeasure = measureTime(
+      'LocalWatcher#parcelSubscribe'
+    )
     this.watcher = await parcel.subscribe(
       this.config.syncPath,
       async (err, events) => {
@@ -106,6 +110,7 @@ class Producer {
       },
       { backend }
     )
+    stopParcelSubscribeMeasure()
     if (!this.watcher) throw new Error('Could not start @parcel/watcher')
 
     this.events.emit('buffering-start')
@@ -120,11 +125,16 @@ class Producer {
   }
 
   async scan(relPath /*: string */) {
+    const stopParcelScanMeasure = measureTime('LocalWatcher#parcelScan')
     const scanEvents = await parcel.scan(
       path.join(this.config.syncPath, relPath),
       { backend }
     )
+    stopParcelScanMeasure()
+
+    const stopProcessEventsMeasure = measureTime('LocalWatcher#processEvents')
     await this.processEvents(scanEvents, { fromScan: true })
+    stopProcessEventsMeasure()
   }
 
   async buildEvent(
diff --git a/core/local/channel_watcher/scan_folder.js b/core/local/channel_watcher/scan_folder.js
index d5d8c3f20..8304687fd 100644
--- a/core/local/channel_watcher/scan_folder.js
+++ b/core/local/channel_watcher/scan_folder.js
@@ -10,6 +10,7 @@
  */
 
 const { logger } = require('../../utils/logger')
+const measureTime = require('../../utils/perfs')
 
 const STEP_NAME = 'scanFolder'
 
@@ -31,6 +32,8 @@ function loop(
   opts /*: { scan: Scanner, fatal: Error => any } */
 ) /*: Channel */ {
   return channel.asyncMap(async batch => {
+    const stopMeasure = measureTime('LocalWatcher#scanFolderStep')
+
     for (const event of batch) {
       if (event.incomplete) {
         continue
@@ -41,6 +44,8 @@ function loop(
         })
       }
     }
+
+    stopMeasure()
     return batch
   }, opts.fatal)
 }
diff --git a/core/local/channel_watcher/win_identical_renaming.js b/core/local/channel_watcher/win_identical_renaming.js
index d2e684f1c..e6817fbe2 100644
--- a/core/local/channel_watcher/win_identical_renaming.js
+++ b/core/local/channel_watcher/win_identical_renaming.js
@@ -15,6 +15,7 @@ const _ = require('lodash')
 const Channel = require('./channel')
 const { logger } = require('../../utils/logger')
 const metadata = require('../../metadata')
+const measureTime = require('../../utils/perfs')
 
 /*::
 import type { ChannelEvent, ChannelBatch } from './event'
@@ -144,6 +145,8 @@ const _loop = async (channel, out, opts) => {
   // eslint-disable-next-line no-constant-condition
   while (true) {
     const events = await channel.pop()
+    const stopMeasure = measureTime('LocalWatcher#winIdenticalRenamingStep')
+
     const {
       state: { [STEP_NAME]: state }
     } = opts
@@ -163,6 +166,8 @@ const _loop = async (channel, out, opts) => {
     pending.timeout = setTimeout(() => {
       output(pending)
     }, DELAY)
+
+    stopMeasure()
   }
 }