RecyclableCollectionsBenchmarks split into multiple files.

Recyclable.Collections.Benchmarks/Benchmarks/AddRangeWhenSourceIsList.cs

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+using BenchmarkDotNet.Attributes;
+using Collections.Pooled;
+
+namespace Recyclable.Collections.Benchmarks
+{
+	public partial class RecyclableCollectionsBenchmarks
+	{
+		//[Benchmark(Baseline = false)]
+		public void List_AddRangeWhenSourceIsList()
+		{
+			var data = TestObjectsAsList;
+			var list = new List<object>();
+			list.AddRange(data);
+		}
+
+		//[Benchmark(Baseline = true)]
+		public void PooledList_AddRangeWhenSourceIsList()
+		{
+			var data = TestObjectsAsList;
+			using var list = new PooledList<object>(capacity: checked((int)TestObjectCount), ClearMode.Always);
+			list.AddRange(data);
+		}
+
+		//[Benchmark(Baseline = false)]
+		public void RecyclableArrayList_AddRangeWhenSourceIsList()
+		{
+			var data = TestObjectsAsList;
+			using var list = new RecyclableArrayList<object>();
+			list.AddRange(data);
+		}
+
+		//[Benchmark(Baseline = false)]
+		public void RecyclableList_AddRangeWhenSourceIsList()
+		{
+			var data = TestObjectsAsList;
+			using var list = new RecyclableList<object>(minBlockSize: BlockSize, expectedItemsCount: TestObjectCount);
+			list.AddRange(data);
+		}
+	}
+}