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lofczlofcz
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reflection: optimize anonymous types
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14 files changed

+1206
-174
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‎src/FastCloner.Benchmark/BenchDynamic.cs‎

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using System.Dynamic;
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using BenchmarkDotNet.Attributes;
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using Force.DeepCloner;
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namespace FastCloner.Benchmark;
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[RankColumn]
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[Orderer(BenchmarkDotNet.Order.SummaryOrderPolicy.FastestToSlowest)]
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[MemoryDiagnoser]
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[GroupBenchmarksBy(BenchmarkDotNet.Configs.BenchmarkLogicalGroupRule.ByCategory)]
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[CategoriesColumn]
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public class BenchDynamic
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{
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private dynamic _simple = null!;
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private dynamic _nested = null!;
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private dynamic _withCollections = null!;
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private dynamic _deepNested = null!;
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private dynamic _circular = null!;
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private StaticContainer _mixed = null!;
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private dynamic _large = null!;
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[GlobalSetup]
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public void Setup()
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{
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_simple = CreateSimpleExpando();
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_nested = CreateNestedExpando();
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_withCollections = CreateExpandoWithCollections();
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_deepNested = CreateDeepNestedExpando(10);
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_circular = CreateCircularExpando();
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_mixed = CreateMixedTypes();
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_large = CreateLargeExpando(100);
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}
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// Simple ExpandoObject
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/*[Benchmark, BenchmarkCategory("Simple")]
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public object FastCloner_Simple() => FastCloner.DeepClone(_simple);
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[Benchmark(Baseline = true), BenchmarkCategory("Simple")]
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public object? DeepCloner_Simple() => _simple.DeepClone();
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// Nested ExpandoObject
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[Benchmark, BenchmarkCategory("Nested")]
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public object FastCloner_Nested() => FastCloner.DeepClone(_nested);
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[Benchmark(Baseline = true), BenchmarkCategory("Nested")]
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public object? DeepCloner_Nested() => ((object)_nested).DeepClone();
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// ExpandoObject with Collections
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[Benchmark, BenchmarkCategory("Collections")]
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public object FastCloner_Collections() => FastCloner.DeepClone(_withCollections);
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[Benchmark(Baseline = true), BenchmarkCategory("Collections")]
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public object? DeepCloner_Collections() => ((object)_withCollections).DeepClone();
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// Deep Nested (10 levels)
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[Benchmark, BenchmarkCategory("DeepNested")]
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public object FastCloner_DeepNested() => FastCloner.DeepClone(_deepNested);
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[Benchmark(Baseline = true), BenchmarkCategory("DeepNested")]
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public object? DeepCloner_DeepNested() => ((object)_deepNested).DeepClone();
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// Circular Reference
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[Benchmark, BenchmarkCategory("Circular")]
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public object FastCloner_Circular() => FastCloner.DeepClone(_circular);
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[Benchmark(Baseline = true), BenchmarkCategory("Circular")]
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public object? DeepCloner_Circular() => ((object)_circular).DeepClone();
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// Mixed Dynamic + Static Types
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[Benchmark, BenchmarkCategory("Mixed")]
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public object? FastCloner_Mixed() => FastCloner.DeepClone(_mixed);
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[Benchmark(Baseline = true), BenchmarkCategory("Mixed")]
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public object? DeepCloner_Mixed() => _mixed.DeepClone();*/
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// Large ExpandoObject (100 properties)
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[Benchmark, BenchmarkCategory("Large")]
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public object FastCloner_Large() => FastCloner.DeepClone(_large);
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[Benchmark(Baseline = true), BenchmarkCategory("Large")]
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public object? DeepCloner_Large() => ((object)_large).DeepClone();
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#region Test Data Creation
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private static dynamic CreateSimpleExpando()
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{
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dynamic expando = new ExpandoObject();
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expando.Name = "Test Object";
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expando.Id = 42;
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expando.IsActive = true;
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expando.CreatedAt = DateTime.UtcNow;
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expando.Price = 99.99m;
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return expando;
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}
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private static dynamic CreateNestedExpando()
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{
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dynamic root = new ExpandoObject();
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root.Name = "Root";
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root.Level = 0;
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dynamic child1 = new ExpandoObject();
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child1.Name = "Child1";
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child1.Level = 1;
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child1.Data = "Some data for child 1";
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dynamic child2 = new ExpandoObject();
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child2.Name = "Child2";
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child2.Level = 1;
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child2.Value = 123.456;
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dynamic grandchild = new ExpandoObject();
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grandchild.Name = "Grandchild";
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grandchild.Level = 2;
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grandchild.Tags = new[] { "tag1", "tag2", "tag3" };
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child1.Child = grandchild;
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root.Children = new List<object> { child1, child2 };
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return root;
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}
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private static dynamic CreateExpandoWithCollections()
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{
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dynamic expando = new ExpandoObject();
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expando.Name = "Collection Test";
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var items = new List<ExpandoObject>();
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for (int i = 0; i < 10; i++)
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{
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dynamic item = new ExpandoObject();
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item.Index = i;
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item.Label = $"Item {i}";
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item.Value = i * 10.5;
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items.Add(item);
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}
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expando.Items = items;
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var dict = new Dictionary<string, ExpandoObject>();
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for (int i = 0; i < 5; i++)
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{
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dynamic entry = new ExpandoObject();
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entry.Key = $"key_{i}";
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entry.Data = $"Data for key {i}";
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dict[$"entry_{i}"] = entry;
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}
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expando.Lookup = dict;
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expando.Numbers = new[] { 1, 2, 3, 4, 5 };
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expando.Strings = new List<string> { "a", "b", "c" };
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return expando;
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}
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private static dynamic CreateDeepNestedExpando(int depth)
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{
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dynamic current = new ExpandoObject();
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current.Level = depth;
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current.Name = $"Level_{depth}";
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current.Data = $"Data at depth {depth}";
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if (depth > 0)
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current.Child = CreateDeepNestedExpando(depth - 1);
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return current;
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}
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private static dynamic CreateCircularExpando()
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{
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dynamic parent = new ExpandoObject();
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parent.Name = "Parent";
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parent.Id = 1;
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dynamic child = new ExpandoObject();
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child.Name = "Child";
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child.Id = 2;
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child.Parent = parent;
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parent.Child = child;
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parent.Self = parent;
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return parent;
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}
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private static StaticContainer CreateMixedTypes()
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{
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dynamic dynamicConfig = new ExpandoObject();
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dynamicConfig.Setting1 = "Value1";
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dynamicConfig.Setting2 = 42;
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dynamicConfig.Nested = new ExpandoObject();
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dynamicConfig.Nested.SubSetting = "SubValue";
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var container = new StaticContainer
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{
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Id = 100,
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Name = "Container",
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DynamicData = dynamicConfig,
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Items = new List<StaticItem>
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{
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new() { ItemId = 1, ItemName = "Item1" },
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new() { ItemId = 2, ItemName = "Item2" },
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}
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};
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dynamicConfig.Container = container;
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return container;
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}
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private static dynamic CreateLargeExpando(int propertyCount)
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{
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dynamic expando = new ExpandoObject();
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var dict = (IDictionary<string, object?>)expando;
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for (int i = 0; i < propertyCount; i++)
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{
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switch (i % 5)
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{
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case 0:
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dict[$"StringProp_{i}"] = $"String value {i}";
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break;
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case 1:
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dict[$"IntProp_{i}"] = i * 10;
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break;
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case 2:
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dict[$"DoubleProp_{i}"] = i * 1.5;
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break;
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case 3:
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dict[$"DateProp_{i}"] = DateTime.UtcNow.AddDays(i);
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break;
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case 4:
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dict[$"NestedProp_{i}"] = new
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{
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NestedId = i,
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NestedValue = $"Nested {i}"
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};;
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break;
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}
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}
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return expando;
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}
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#endregion
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}
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public class StaticContainer
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{
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public int Id { get; set; }
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public string Name { get; set; } = "";
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public dynamic? DynamicData { get; set; }
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public List<StaticItem> Items { get; set; } = new();
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}
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public class StaticItem
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{
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public int ItemId { get; set; }
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public string ItemName { get; set; } = "";
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}

‎src/FastCloner.Benchmark/Program.cs‎

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ManualConfig config = DefaultConfig.Instance
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.WithOptions(ConfigOptions.DisableOptimizationsValidator);
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Summary summary = BenchmarkRunner.Run<BenchMinimal>(config);
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Summary summary = BenchmarkRunner.Run<BenchDynamic>(config);
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Console.WriteLine(summary);
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}
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}

‎src/FastCloner.Profiling/FastCloner.Profiling.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net10.0</TargetFramework>
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<LangVersion>preview</LangVersion>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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<DebugType>full</DebugType>
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<DebugSymbols>true</DebugSymbols>
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</PropertyGroup>
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<ItemGroup>
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<ProjectReference Include="..\FastCloner\FastCloner.csproj" />
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<ProjectReference Include="..\FastCloner.SourceGenerator\FastCloner.SourceGenerator.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
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<ProjectReference Include="..\FastCloner.SourceGenerator.Shared\FastCloner.SourceGenerator.Shared.csproj" />
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</ItemGroup>
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</Project>

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