начало разделенных контекстов

mROA.Benchmark/Program.cs

@@ -1,9 +1,51 @@
-namespace mROA.Benchmark;
+using System.Collections.Immutable;
+using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Running;
+
+namespace mROA.Benchmark;
 
 class Program
 {
     static void Main(string[] args)
     {
         Console.WriteLine("Hello, World!");
+        var summary = BenchmarkRunner.Run<CollectionsSpeed>();
+
+    }
+}
+
+public class CollectionsSpeed
+{
+    private const int N = 1000;
+    
+    private readonly List<int> _immutable;
+    private readonly int[] _array;
+
+    public CollectionsSpeed()
+    {
+        _array = Enumerable.Range(0, N).ToArray();
+        _immutable = [.._array];
+    }
+
+    [Benchmark]
+    public int DefaultArray()
+    {
+        var sum = 0;
+        for (int i = 0; i < N; i++)
+        {
+            sum += _array[i];
+        }
+        return sum;
+    }
+    
+    [Benchmark]
+    public int ImmutableArray()
+    {
+        var sum = 0;
+        for (int i = 0; i < N; i++)
+        {
+            sum += _immutable[i];
+        }
+        return sum;
     }
 }