rubber duck tournament perfs by caching round tourney views for 2

seconds

app/controllers/Round.scala

@@ -166,7 +166,7 @@ object Round extends LilaController with TheftPrevention {
   private def myTour(tourId: Option[String])(implicit ctx: Context): Fu[Option[Tourney]] =
     tourId ?? { tid =>
       ctx.userId ?? { uid =>
-        TournamentRepo.byIdAndPlayerId(tid, uid)
+        Env.tournament.cached tour tid map (_ filter (_ contains uid))
       }
     }
 

app/controllers/Tournament.scala

@@ -58,8 +58,9 @@ object Tournament extends LilaController {
   }
 
   def gameStanding(id: String) = Open { implicit ctx =>
-    OptionOk(repo startedOrFinishedById id) { tour =>
-      html.tournament.gameStanding(tour, true)
+    env.cached tour id map {
+      case Some(t: lila.tournament.StartedOrFinished) => Ok(html.tournament.gameStanding(t, true))
+      case _ => NotFound
     }
   }
 

modules/tournament/src/main/Cached.scala

@@ -9,5 +9,11 @@ private[tournament] final class Cached {
     timeToLive = 6 hours,
     default = _ => none)
 
-  def name(id: String) = nameCache get id
+  def name(id: String): Option[String] = nameCache get id
+
+  private val staleViewCache = lila.memo.AsyncCache[String, Option[Tournament]](
+    (id: String) => TournamentRepo byId id,
+    timeToLive = 2 seconds)
+
+  def tour(id: String): Fu[Option[Tournament]] = staleViewCache(id)
 }