diff --git a/app/controllers/KeyPages.scala b/app/controllers/KeyPages.scala
index adcf1643b4..baf17e22aa 100644
--- a/app/controllers/KeyPages.scala
+++ b/app/controllers/KeyPages.scala
@@ -17,7 +17,12 @@ final class KeyPages(env: Env)(implicit ec: scala.concurrent.ExecutionContext) {
         events = env.event.api.promoteTo(ctx.req).nevermind,
         simuls = env.simul.allCreatedFeaturable.get.nevermind
       )
-      .map(h => html.lobby.home(h))
+      .mon(_.lobby segment "preloader")
+      .map { h =>
+        lila.mon.chronoSync(_.lobby segment "render") {
+          html.lobby.home(h)
+        }
+      }
       .dmap { (html: Frag) =>
         env.lilaCookie.ensure(ctx.req)(status(html))
       }
diff --git a/app/controllers/Lobby.scala b/app/controllers/Lobby.scala
index eb52a9441c..e2e30f3ea6 100644
--- a/app/controllers/Lobby.scala
+++ b/app/controllers/Lobby.scala
@@ -20,7 +20,7 @@ final class Lobby(
   def home = Open { implicit ctx =>
     pageHit
     negotiate(
-      html = keyPages.home(Results.Ok).map(NoCache),
+      html = keyPages.home(Results.Ok).dmap(NoCache),
       api = _ =>
         fuccess {
           val expiration = 60 * 60 * 24 * 7 // set to one hour, one week before changing the pool config
diff --git a/app/mashup/Preload.scala b/app/mashup/Preload.scala
index 6f65529ba3..af044003de 100644
--- a/app/mashup/Preload.scala
+++ b/app/mashup/Preload.scala
@@ -39,43 +39,46 @@ final class Preload(
       events: Fu[List[Event]],
       simuls: Fu[List[Simul]]
   )(implicit ctx: Context): Fu[Homepage] =
-    lobbyApi(ctx) zip
-      posts zip
-      tours zip
-      events zip
-      simuls zip
-      tv.getBestGame zip
-      (ctx.userId ?? timelineApi.userEntries) zip
-      userCached.topWeek(()) zip
-      tourWinners.all.dmap(_.top) zip
-      (ctx.noBot ?? dailyPuzzle()) zip
-      liveStreamApi.all.dmap(_.autoFeatured withTitles lightUserApi) zip
-      (ctx.userId ?? playbanApi.currentBan) zip
+    lobbyApi(ctx).mon(_.lobby segment "lobbyApi") zip
+      posts.mon(_.lobby segment "posts") zip
+      tours.mon(_.lobby segment "tours") zip
+      events.mon(_.lobby segment "events") zip
+      simuls.mon(_.lobby segment "simuls") zip
+      tv.getBestGame.mon(_.lobby segment "tvBestGame") zip
+      (ctx.userId ?? timelineApi.userEntries).mon(_.lobby segment "timeline") zip
+      userCached.topWeek(()).mon(_.lobby segment "userTopWeek") zip
+      tourWinners.all.dmap(_.top).mon(_.lobby segment "tourWinners") zip
+      (ctx.noBot ?? dailyPuzzle()).mon(_.lobby segment "puzzle") zip
+      liveStreamApi.all.dmap(_.autoFeatured withTitles lightUserApi).mon(_.lobby segment "streams") zip
+      (ctx.userId ?? playbanApi.currentBan).mon(_.lobby segment "playban") zip
       (ctx.blind ?? ctx.me ?? roundProxy.urgentGames) flatMap {
       case (data, povs) ~ posts ~ tours ~ events ~ simuls ~ feat ~ entries ~ lead ~ tWinners ~ puzzle ~ streams ~ playban ~ blindGames =>
-        (ctx.me ?? currentGameMyTurn(povs, lightUserApi.sync) _) flatMap { currentGame =>
-          lightUserApi.preloadMany {
-            tWinners.map(_.userId) :::
-              posts.flatMap(_.userId) :::
-              entries.flatMap(_.userIds).toList
-          } inject Homepage(
-            data,
-            entries,
-            posts,
-            tours,
-            events,
-            simuls,
-            feat,
-            lead,
-            tWinners,
-            puzzle,
-            streams.excludeUsers(events.flatMap(_.hostedBy)),
-            lastPostCache.apply,
-            playban,
-            currentGame,
-            simulIsFeaturable,
-            blindGames
-          )
+        (ctx.me ?? currentGameMyTurn(povs, lightUserApi.sync) _)
+          .mon(_.lobby segment "currentGame") zip
+          lightUserApi
+            .preloadMany {
+              tWinners.map(_.userId) ::: posts.flatMap(_.userId) ::: entries.flatMap(_.userIds).toList
+            }
+            .mon(_.lobby segment "lightUsers") map {
+          case (currentGame, _) =>
+            Homepage(
+              data,
+              entries,
+              posts,
+              tours,
+              events,
+              simuls,
+              feat,
+              lead,
+              tWinners,
+              puzzle,
+              streams.excludeUsers(events.flatMap(_.hostedBy)),
+              lastPostCache.apply,
+              playban,
+              currentGame,
+              simulIsFeaturable,
+              blindGames
+            )
         }
     }
 
diff --git a/modules/api/src/main/LobbyApi.scala b/modules/api/src/main/LobbyApi.scala
index 7bcdc52fd5..debc45f382 100644
--- a/modules/api/src/main/LobbyApi.scala
+++ b/modules/api/src/main/LobbyApi.scala
@@ -19,9 +19,9 @@ final class LobbyApi(
   val poolsJson = Json toJson pools
 
   def apply(implicit ctx: Context): Fu[(JsObject, List[Pov])] =
-    ctx.me.fold(seekApi.forAnon)(seekApi.forUser) zip
-      (ctx.me ?? gameProxyRepo.urgentGames) zip
-      getFilter(ctx) flatMap {
+    ctx.me.fold(seekApi.forAnon)(seekApi.forUser).mon(_.lobby segment "seeks") zip
+      (ctx.me ?? gameProxyRepo.urgentGames).mon(_.lobby segment "urgentGames") zip
+      getFilter(ctx).mon(_.lobby segment "filter") flatMap {
       case seeks ~ povs ~ filter =>
         val displayedPovs = povs take 9
         lightUserApi.preloadMany(displayedPovs.flatMap(_.opponent.userId)) inject {
diff --git a/modules/common/src/main/mon.scala b/modules/common/src/main/mon.scala
index ba19249176..0bd1334446 100644
--- a/modules/common/src/main/mon.scala
+++ b/modules/common/src/main/mon.scala
@@ -112,6 +112,8 @@ object mon {
         def duration(id: String) = timer("lobby.pool.gameStart.duration").withTag("pool", id)
       }
     }
+    private val lobbySegment = timer("lobby.segment")
+    def segment(seg: String) = lobbySegment.withTag("segment", seg)
   }
   object rating {
     def distribution(perfKey: String, rating: Int) =
@@ -521,6 +523,8 @@ object mon {
     def time(name: String) = timer("blocking.time").withTag("name", name)
   }
 
+  def chronoSync[A] = lila.common.Chronometer.syncMon[A] _
+
   type TimerPath   = lila.mon.type => Timer
   type CounterPath = lila.mon.type => Counter