Add debounce logic in several places

osu.Game/Screens/Multi/Lounge/Components/RoomsContainer.cs

@@ -9,6 +9,7 @@ using osu.Framework.Bindables;
 using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
+using osu.Framework.Threading;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Online.Multiplayer;
 using osuTK;
@@ -62,7 +63,10 @@ namespace osu.Game.Screens.Multi.Lounge.Components
 
         protected override void LoadComplete()
         {
-            filter?.BindValueChanged(f => Filter(f.NewValue), true);
+            filter?.BindValueChanged(f => scheduleFilter());
+
+            if (filter != null)
+                Filter(filter.Value);
         }
 
         public void Filter(FilterCriteria criteria)
@@ -89,6 +93,17 @@ namespace osu.Game.Screens.Multi.Lounge.Components
             });
         }
 
+        private ScheduledDelegate scheduledFilter;
+
+        private void scheduleFilter()
+        {
+            if (filter == null)
+                return;
+
+            scheduledFilter?.Cancel();
+            scheduledFilter = Scheduler.AddDelayed(() => Filter(filter.Value), 200);
+        }
+
         private void addRooms(IEnumerable<Room> rooms)
         {
             foreach (var r in rooms)

osu.Game/Screens/Multi/RoomManager.cs

@@ -7,6 +7,7 @@ using System.Threading.Tasks;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Logging;
+using osu.Framework.Threading;
 using osu.Game.Beatmaps;
 using osu.Game.Online;
 using osu.Game.Online.API;
@@ -44,7 +45,7 @@ namespace osu.Game.Screens.Multi
             currentFilter.BindValueChanged(_ =>
             {
                 if (IsLoaded)
-                    PollImmediately();
+                    schedulePoll();
             });
         }
 
@@ -157,6 +158,14 @@ namespace osu.Game.Screens.Multi
             return tcs.Task;
         }
 
+        private ScheduledDelegate scheduledPoll;
+
+        private void schedulePoll()
+        {
+            scheduledPoll?.Cancel();
+            scheduledPoll = Scheduler.AddDelayed(PollImmediately, 200);
+        }
+
         /// <summary>
         /// Updates a local <see cref="Room"/> with a remote copy.
         /// </summary>