diff --git a/osu.Game.Rulesets.Catch/Beatmaps/CatchBeatmapConverter.cs b/osu.Game.Rulesets.Catch/Beatmaps/CatchBeatmapConverter.cs
index 145a40f5f5..34964fc4ae 100644
--- a/osu.Game.Rulesets.Catch/Beatmaps/CatchBeatmapConverter.cs
+++ b/osu.Game.Rulesets.Catch/Beatmaps/CatchBeatmapConverter.cs
@@ -5,6 +5,7 @@ using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Objects;
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Objects;
 using osu.Framework.Extensions.IEnumerableExtensions;
@@ -20,7 +21,7 @@ namespace osu.Game.Rulesets.Catch.Beatmaps
 
         public override bool CanConvert() => Beatmap.HitObjects.All(h => h is IHasXPosition);
 
-        protected override IEnumerable<CatchHitObject> ConvertHitObject(HitObject obj, IBeatmap beatmap)
+        protected override IEnumerable<CatchHitObject> ConvertHitObject(HitObject obj, IBeatmap beatmap, CancellationToken cancellationToken)
         {
             var positionData = obj as IHasXPosition;
             var comboData = obj as IHasCombo;
diff --git a/osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs b/osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs
index 211905835c..524ea27efa 100644
--- a/osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs
+++ b/osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs
@@ -5,6 +5,7 @@ using osu.Game.Rulesets.Mania.Objects;
 using System;
 using System.Linq;
 using System.Collections.Generic;
+using System.Threading;
 using osu.Game.Audio;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Objects;
@@ -68,14 +69,14 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
 
         public override bool CanConvert() => Beatmap.HitObjects.All(h => h is IHasXPosition);
 
-        protected override Beatmap<ManiaHitObject> ConvertBeatmap(IBeatmap original)
+        protected override Beatmap<ManiaHitObject> ConvertBeatmap(IBeatmap original, CancellationToken cancellationToken)
         {
             BeatmapDifficulty difficulty = original.BeatmapInfo.BaseDifficulty;
 
             int seed = (int)MathF.Round(difficulty.DrainRate + difficulty.CircleSize) * 20 + (int)(difficulty.OverallDifficulty * 41.2) + (int)MathF.Round(difficulty.ApproachRate);
             Random = new FastRandom(seed);
 
-            return base.ConvertBeatmap(original);
+            return base.ConvertBeatmap(original, cancellationToken);
         }
 
         protected override Beatmap<ManiaHitObject> CreateBeatmap()
@@ -88,7 +89,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
             return beatmap;
         }
 
-        protected override IEnumerable<ManiaHitObject> ConvertHitObject(HitObject original, IBeatmap beatmap)
+        protected override IEnumerable<ManiaHitObject> ConvertHitObject(HitObject original, IBeatmap beatmap, CancellationToken cancellationToken)
         {
             if (original is ManiaHitObject maniaOriginal)
             {
diff --git a/osu.Game.Rulesets.Osu/Beatmaps/OsuBeatmapConverter.cs b/osu.Game.Rulesets.Osu/Beatmaps/OsuBeatmapConverter.cs
index fcad356a1c..a2fc4848af 100644
--- a/osu.Game.Rulesets.Osu/Beatmaps/OsuBeatmapConverter.cs
+++ b/osu.Game.Rulesets.Osu/Beatmaps/OsuBeatmapConverter.cs
@@ -8,6 +8,7 @@ using osu.Game.Rulesets.Osu.Objects;
 using System.Collections.Generic;
 using osu.Game.Rulesets.Objects.Types;
 using System.Linq;
+using System.Threading;
 using osu.Game.Rulesets.Osu.UI;
 using osu.Framework.Extensions.IEnumerableExtensions;
 
@@ -22,7 +23,7 @@ namespace osu.Game.Rulesets.Osu.Beatmaps
 
         public override bool CanConvert() => Beatmap.HitObjects.All(h => h is IHasPosition);
 
-        protected override IEnumerable<OsuHitObject> ConvertHitObject(HitObject original, IBeatmap beatmap)
+        protected override IEnumerable<OsuHitObject> ConvertHitObject(HitObject original, IBeatmap beatmap, CancellationToken cancellationToken)
         {
             var positionData = original as IHasPosition;
             var comboData = original as IHasCombo;
diff --git a/osu.Game.Rulesets.Osu/Objects/Spinner.cs b/osu.Game.Rulesets.Osu/Objects/Spinner.cs
index 1658a4e7c2..194aa640f9 100644
--- a/osu.Game.Rulesets.Osu/Objects/Spinner.cs
+++ b/osu.Game.Rulesets.Osu/Objects/Spinner.cs
@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System.Threading;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Rulesets.Judgements;
@@ -48,14 +49,16 @@ namespace osu.Game.Rulesets.Osu.Objects
             MaximumBonusSpins = (int)((maximum_rotations_per_second - minimumRotationsPerSecond) * secondsDuration);
         }
 
-        protected override void CreateNestedHitObjects()
+        protected override void CreateNestedHitObjects(CancellationToken cancellationToken)
         {
-            base.CreateNestedHitObjects();
+            base.CreateNestedHitObjects(cancellationToken);
 
             int totalSpins = MaximumBonusSpins + SpinsRequired;
 
             for (int i = 0; i < totalSpins; i++)
             {
+                cancellationToken.ThrowIfCancellationRequested();
+
                 double startTime = StartTime + (float)(i + 1) / totalSpins * Duration;
 
                 AddNested(i < SpinsRequired
diff --git a/osu.Game.Rulesets.Taiko/Beatmaps/TaikoBeatmapConverter.cs b/osu.Game.Rulesets.Taiko/Beatmaps/TaikoBeatmapConverter.cs
index e6f6b9faac..9e82161a61 100644
--- a/osu.Game.Rulesets.Taiko/Beatmaps/TaikoBeatmapConverter.cs
+++ b/osu.Game.Rulesets.Taiko/Beatmaps/TaikoBeatmapConverter.cs
@@ -9,6 +9,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using osu.Framework.Utils;
+using System.Threading;
 using osu.Game.Audio;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Beatmaps.Formats;
@@ -49,14 +50,14 @@ namespace osu.Game.Rulesets.Taiko.Beatmaps
 
         public override bool CanConvert() => true;
 
-        protected override Beatmap<TaikoHitObject> ConvertBeatmap(IBeatmap original)
+        protected override Beatmap<TaikoHitObject> ConvertBeatmap(IBeatmap original, CancellationToken cancellationToken)
         {
             // Rewrite the beatmap info to add the slider velocity multiplier
             original.BeatmapInfo = original.BeatmapInfo.Clone();
             original.BeatmapInfo.BaseDifficulty = original.BeatmapInfo.BaseDifficulty.Clone();
             original.BeatmapInfo.BaseDifficulty.SliderMultiplier *= LEGACY_VELOCITY_MULTIPLIER;
 
-            Beatmap<TaikoHitObject> converted = base.ConvertBeatmap(original);
+            Beatmap<TaikoHitObject> converted = base.ConvertBeatmap(original, cancellationToken);
 
             if (original.BeatmapInfo.RulesetID == 3)
             {
@@ -73,7 +74,7 @@ namespace osu.Game.Rulesets.Taiko.Beatmaps
             return converted;
         }
 
-        protected override IEnumerable<TaikoHitObject> ConvertHitObject(HitObject obj, IBeatmap beatmap)
+        protected override IEnumerable<TaikoHitObject> ConvertHitObject(HitObject obj, IBeatmap beatmap, CancellationToken cancellationToken)
         {
             // Old osu! used hit sounding to determine various hit type information
             IList<HitSampleInfo> samples = obj.Samples;
diff --git a/osu.Game.Tests/Visual/Gameplay/TestSceneDrawableScrollingRuleset.cs b/osu.Game.Tests/Visual/Gameplay/TestSceneDrawableScrollingRuleset.cs
index bd7e894cf8..1a1babb4a8 100644
--- a/osu.Game.Tests/Visual/Gameplay/TestSceneDrawableScrollingRuleset.cs
+++ b/osu.Game.Tests/Visual/Gameplay/TestSceneDrawableScrollingRuleset.cs
@@ -4,6 +4,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading;
 using NUnit.Framework;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
@@ -276,7 +277,7 @@ namespace osu.Game.Tests.Visual.Gameplay
 
             public override bool CanConvert() => true;
 
-            protected override IEnumerable<TestHitObject> ConvertHitObject(HitObject original, IBeatmap beatmap)
+            protected override IEnumerable<TestHitObject> ConvertHitObject(HitObject original, IBeatmap beatmap, CancellationToken cancellationToken)
             {
                 yield return new TestHitObject
                 {
diff --git a/osu.Game/Beatmaps/BeatmapConverter.cs b/osu.Game/Beatmaps/BeatmapConverter.cs
index 11fee030f8..cb0b3a8d09 100644
--- a/osu.Game/Beatmaps/BeatmapConverter.cs
+++ b/osu.Game/Beatmaps/BeatmapConverter.cs
@@ -4,6 +4,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Objects;
 
@@ -26,6 +27,8 @@ namespace osu.Game.Beatmaps
 
         public IBeatmap Beatmap { get; }
 
+        private CancellationToken cancellationToken;
+
         protected BeatmapConverter(IBeatmap beatmap, Ruleset ruleset)
         {
             Beatmap = beatmap;
@@ -36,14 +39,25 @@ namespace osu.Game.Beatmaps
         /// </summary>
         public abstract bool CanConvert();
 
-        /// <summary>
-        /// Converts <see cref="Beatmap"/>.
-        /// </summary>
-        /// <returns>The converted Beatmap.</returns>
-        public IBeatmap Convert()
+        public IBeatmap Convert(CancellationToken cancellationToken = default)
         {
+            this.cancellationToken = cancellationToken;
+
             // We always operate on a clone of the original beatmap, to not modify it game-wide
-            return ConvertBeatmap(Beatmap.Clone());
+            return ConvertBeatmap(Beatmap.Clone(), cancellationToken);
+        }
+
+        /// <summary>
+        /// Performs the conversion of a Beatmap using this Beatmap Converter.
+        /// </summary>
+        /// <param name="original">The un-converted Beatmap.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>The converted Beatmap.</returns>
+        protected virtual Beatmap<T> ConvertBeatmap(IBeatmap original, CancellationToken cancellationToken)
+        {
+#pragma warning disable 618
+            return ConvertBeatmap(original);
+#pragma warning restore 618
         }
 
         /// <summary>
@@ -51,19 +65,20 @@ namespace osu.Game.Beatmaps
         /// </summary>
         /// <param name="original">The un-converted Beatmap.</param>
         /// <returns>The converted Beatmap.</returns>
+        [Obsolete("Use the cancellation-supporting override")] // Can be removed 20210318
         protected virtual Beatmap<T> ConvertBeatmap(IBeatmap original)
         {
             var beatmap = CreateBeatmap();
 
             beatmap.BeatmapInfo = original.BeatmapInfo;
             beatmap.ControlPointInfo = original.ControlPointInfo;
-            beatmap.HitObjects = convertHitObjects(original.HitObjects, original).OrderBy(s => s.StartTime).ToList();
+            beatmap.HitObjects = convertHitObjects(original.HitObjects, original, cancellationToken).OrderBy(s => s.StartTime).ToList();
             beatmap.Breaks = original.Breaks;
 
             return beatmap;
         }
 
-        private List<T> convertHitObjects(IReadOnlyList<HitObject> hitObjects, IBeatmap beatmap)
+        private List<T> convertHitObjects(IReadOnlyList<HitObject> hitObjects, IBeatmap beatmap, CancellationToken cancellationToken)
         {
             var result = new List<T>(hitObjects.Count);
 
@@ -75,7 +90,7 @@ namespace osu.Game.Beatmaps
                     continue;
                 }
 
-                var converted = ConvertHitObject(obj, beatmap);
+                var converted = ConvertHitObject(obj, beatmap, cancellationToken);
 
                 if (ObjectConverted != null)
                 {
@@ -104,7 +119,23 @@ namespace osu.Game.Beatmaps
         /// </summary>
         /// <param name="original">The hit object to convert.</param>
         /// <param name="beatmap">The un-converted Beatmap.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
         /// <returns>The converted hit object.</returns>
-        protected abstract IEnumerable<T> ConvertHitObject(HitObject original, IBeatmap beatmap);
+        protected virtual IEnumerable<T> ConvertHitObject(HitObject original, IBeatmap beatmap, CancellationToken cancellationToken)
+        {
+#pragma warning disable 618
+            return ConvertHitObject(original, beatmap);
+#pragma warning restore 618
+        }
+
+        /// <summary>
+        /// Performs the conversion of a hit object.
+        /// This method is generally executed sequentially for all objects in a beatmap.
+        /// </summary>
+        /// <param name="original">The hit object to convert.</param>
+        /// <param name="beatmap">The un-converted Beatmap.</param>
+        /// <returns>The converted hit object.</returns>
+        [Obsolete("Use the cancellation-supporting override")] // Can be removed 20210318
+        protected virtual IEnumerable<T> ConvertHitObject(HitObject original, IBeatmap beatmap) => Enumerable.Empty<T>();
     }
 }
diff --git a/osu.Game/Beatmaps/DummyWorkingBeatmap.cs b/osu.Game/Beatmaps/DummyWorkingBeatmap.cs
index af2a2ac250..c114358771 100644
--- a/osu.Game/Beatmaps/DummyWorkingBeatmap.cs
+++ b/osu.Game/Beatmaps/DummyWorkingBeatmap.cs
@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Threading;
 using JetBrains.Annotations;
 using osu.Framework.Audio;
 using osu.Framework.Audio.Track;
@@ -76,7 +77,7 @@ namespace osu.Game.Beatmaps
 
                     public bool CanConvert() => true;
 
-                    public IBeatmap Convert()
+                    public IBeatmap Convert(CancellationToken cancellationToken = default)
                     {
                         foreach (var obj in Beatmap.HitObjects)
                             ObjectConverted?.Invoke(obj, obj.Yield());
diff --git a/osu.Game/Beatmaps/IBeatmapConverter.cs b/osu.Game/Beatmaps/IBeatmapConverter.cs
index 173d5494ba..2833af8ca2 100644
--- a/osu.Game/Beatmaps/IBeatmapConverter.cs
+++ b/osu.Game/Beatmaps/IBeatmapConverter.cs
@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Threading;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Objects;
 
@@ -30,6 +31,8 @@ namespace osu.Game.Beatmaps
         /// <summary>
         /// Converts <see cref="Beatmap"/>.
         /// </summary>
-        IBeatmap Convert();
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>The converted Beatmap.</returns>
+        IBeatmap Convert(CancellationToken cancellationToken = default);
     }
 }
diff --git a/osu.Game/Beatmaps/WorkingBeatmap.cs b/osu.Game/Beatmaps/WorkingBeatmap.cs
index d9780233d1..30382c444f 100644
--- a/osu.Game/Beatmaps/WorkingBeatmap.cs
+++ b/osu.Game/Beatmaps/WorkingBeatmap.cs
@@ -109,7 +109,7 @@ namespace osu.Game.Beatmaps
                 }
 
                 // Convert
-                IBeatmap converted = converter.Convert();
+                IBeatmap converted = converter.Convert(cancellationSource.Token);
 
                 // Apply conversion mods to the result
                 foreach (var mod in mods.OfType<IApplicableAfterBeatmapConversion>())
diff --git a/osu.Game/Overlays/UserProfileOverlay.cs b/osu.Game/Overlays/UserProfileOverlay.cs
index 2b316c0e34..d52ad84592 100644
--- a/osu.Game/Overlays/UserProfileOverlay.cs
+++ b/osu.Game/Overlays/UserProfileOverlay.cs
@@ -8,6 +8,7 @@ using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Graphics.UserInterface;
+using osu.Framework.Input.Events;
 using osu.Game.Graphics.Containers;
 using osu.Game.Online.API.Requests;
 using osu.Game.Overlays.Profile;
@@ -176,6 +177,10 @@ namespace osu.Game.Overlays
                 AccentColour = colourProvider.Highlight1;
             }
 
+            protected override bool OnClick(ClickEvent e) => true;
+
+            protected override bool OnHover(HoverEvent e) => true;
+
             private class ProfileSectionTabItem : OverlayTabItem
             {
                 public ProfileSectionTabItem(ProfileSection value)
diff --git a/osu.Game/Rulesets/Objects/HitObject.cs b/osu.Game/Rulesets/Objects/HitObject.cs
index 1d60b266e3..0dfde834ee 100644
--- a/osu.Game/Rulesets/Objects/HitObject.cs
+++ b/osu.Game/Rulesets/Objects/HitObject.cs
@@ -145,6 +145,7 @@ namespace osu.Game.Rulesets.Objects
 #pragma warning restore 618
         }
 
+        [Obsolete("Use the cancellation-supporting override")] // Can be removed 20210318
         protected virtual void CreateNestedHitObjects()
         {
         }