move to TUnit, fix thread safety edge cases

.bench-harness-current/BenchHarness.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\src\FastCloner\FastCloner.csproj" />
+  </ItemGroup>
+</Project>

.bench-harness-current/Program.cs

@@ -0,0 +1,34 @@
+using System.Diagnostics;
+using FastCloner;
+
+var results = new List<(string Name, double Ms, double NsPerOp)>();
+Measure("SmallObject x100000", CreateSmallObject(), 2000, 100000, static x => FastCloner.FastCloner.DeepClone((SmallObject)x)!);
+Measure("StringArray1000 x20000", CreateStringArray(1000), 500, 20000, static x => FastCloner.FastCloner.DeepClone((string[])x)!);
+Measure("Dictionary50 x5000", CreateDictionary(50), 200, 5000, static x => FastCloner.FastCloner.DeepClone((Dictionary<string, SmallObject>)x)!);
+foreach (var (name, ms, nsPerOp) in results)
+    Console.WriteLine($"{name}|{ms:F2}|{nsPerOp:F1}");
+
+void Measure(string name, object value, int warmup, int iterations, Func<object, object> clone)
+{
+    for (var i = 0; i < warmup; i++) _ = clone(value);
+    GC.Collect();
+    GC.WaitForPendingFinalizers();
+    GC.Collect();
+    var sw = Stopwatch.StartNew();
+    for (var i = 0; i < iterations; i++) _ = clone(value);
+    sw.Stop();
+    results.Add((name, sw.Elapsed.TotalMilliseconds, sw.Elapsed.TotalMilliseconds * 1_000_000d / iterations));
+}
+
+static SmallObject CreateSmallObject() => new() { Id = 123, Name = "small-object-name", CreatedAt = new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc), IsActive = true, Score = 42.5 };
+static string[] CreateStringArray(int count) { var arr = new string[count]; for (var i = 0; i < count; i++) arr[i] = $"value-{i}"; return arr; }
+static Dictionary<string, SmallObject> CreateDictionary(int count) { var dict = new Dictionary<string, SmallObject>(count); for (var i = 0; i < count; i++) dict[$"key-{i}"] = new SmallObject { Id = i, Name = $"item-{i}", CreatedAt = new DateTime(2025, 1, 1).AddMinutes(i), IsActive = (i & 1) == 0, Score = i * 1.25 }; return dict; }
+
+public sealed class SmallObject
+{
+    public int Id { get; set; }
+    public string Name { get; set; } = string.Empty;
+    public DateTime CreatedAt { get; set; }
+    public bool IsActive { get; set; }
+    public double Score { get; set; }
+}

src/FastCloner.Benchmark/Program.cs

@@ -5,11 +5,11 @@
 
 namespace FastCloner.Benchmark;
 
-class Program
+internal class Program
 {
     static void Main(string[] args)
     {
-        // this is used only for package "FastDeepCloner" which is not properly packed; todo: fork it and pack for a fair bench
+        // this is used only for package "FastDeepCloner" which is not properly packed
         ManualConfig config = DefaultConfig.Instance
             .WithOptions(ConfigOptions.DisableOptimizationsValidator);
 
@@ -49,7 +49,7 @@ private static IBenchmarkIdea[] GetIdeas()
     {
         return typeof(Program).Assembly
             .GetTypes()
-            .Where(t => !t.IsAbstract && !t.IsInterface && typeof(IBenchmarkIdea).IsAssignableFrom(t))
+            .Where(t => t is { IsAbstract: false, IsInterface: false } && typeof(IBenchmarkIdea).IsAssignableFrom(t))
             .Select(t => (IBenchmarkIdea)Activator.CreateInstance(t)!)
             .OrderBy(x => x.Id, StringComparer.OrdinalIgnoreCase)
             .ToArray();