Add/improve benchmarks

osu.Framework.Benchmarks/BenchmarkBindableList.cs

@@ -1,22 +1,69 @@
 // 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.Linq;
 using BenchmarkDotNet.Attributes;
 using osu.Framework.Bindables;
 
 namespace osu.Framework.Benchmarks
 {
     [MemoryDiagnoser]
+    [WarmupCount(0)]
+    [IterationCount(2)]
     public class BenchmarkBindableList
     {
-        private readonly BindableList<int> list = new BindableList<int>();
-        private IBindableList<int> iList => list;
+        private static readonly int[] small_data = Enumerable.Range(0, 10).ToArray();
+
+        [Params(0, 1, 10, 20)]
+        public int NumBindings { get; set; }
+
+        private BindableList<int>[] lists = null!;
 
         [GlobalSetup]
         public void GlobalSetup()
         {
-            for (int i = 0; i < 10; i++)
-                list.Add(i);
+            lists = new BindableList<int>[NumBindings + 1];
+
+            lists[0] = new BindableList<int>(Enumerable.Range(0, 10000).ToArray());
+            for (int i = 1; i < lists.Length; i++)
+                lists[i] = lists[i - 1].GetBoundCopy();
+            lists[0].Clear();
+        }
+
+        [Benchmark(Baseline = true)]
+        public void Create()
+        {
+            setupList();
+        }
+
+        [Benchmark]
+        public void Add()
+        {
+            setupList().Add(1);
+        }
+
+        [Benchmark]
+        public void Remove()
+        {
+            setupList().Remove(0);
+        }
+
+        [Benchmark]
+        public void Clear()
+        {
+            setupList().Clear();
+        }
+
+        [Benchmark]
+        public void AddRange()
+        {
+            setupList().AddRange(small_data);
+        }
+
+        [Benchmark]
+        public void SetIndex()
+        {
+            setupList()[0]++;
         }
 
         [Benchmark]
@@ -24,27 +71,17 @@ namespace osu.Framework.Benchmarks
         {
             int result = 0;
 
-            for (int i = 0; i < 100; i++)
-            {
-                foreach (int val in list)
-                    result += val;
-            }
+            foreach (int val in setupList())
+                result += val;
 
             return result;
         }
 
-        [Benchmark]
-        public int EnumerateInterface()
+        private BindableList<int> setupList()
         {
-            int result = 0;
-
-            for (int i = 0; i < 100; i++)
-            {
-                foreach (int val in iList)
-                    result += val;
-            }
-
-            return result;
+            lists[0].Clear();
+            lists[0].Add(0);
+            return lists[0];
         }
     }
 }