RecyclableBlockList renamed to RecyclableArrayList for clarity. First set of optimizations and implementation.

Recyclable.Collections.Benchmarks/RecyclableCollectionsBenchmarks.RecyclableList.cs

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+using BenchmarkDotNet.Attributes;
+
+namespace Recyclable.Collections.Benchmarks
+{
+	public partial class RecyclableCollectionsBenchmarks : BenchmarkBase
+	{
+		private readonly RecyclableList<object> _testRecyclableList;
+
+		[Benchmark]
+		public void RecyclableList_Create()
+		{
+			using var list = new RecyclableList<object>();
+			DoNothing(list);
+		}
+
+		[Benchmark]
+		public void RecyclableList_Create_0Capacity()
+		{
+			using var list = new RecyclableList<object>(totalItemsCount: 0);
+			DoNothing(list);
+		}
+
+		[Benchmark]
+		public void RecyclableList_Create_WithCapacity()
+		{
+			using var list = new RecyclableList<object>(totalItemsCount: TestObjectCount);
+			DoNothing(list);
+		}
+
+		//[Benchmark]
+		public void RecyclableList_Add()
+		{
+			var data = TestObjects;
+			var dataCount = TestObjectCount;
+			using var list = new RecyclableList<object>();
+			for (var i = 0; i < dataCount; i++)
+			{
+				list.Add(data[i]);
+			}
+		}
+
+		//[Benchmark]
+		public void RecyclableList_Add_WithCapacity()
+		{
+			var data = TestObjects;
+			var dataCount = TestObjectCount;
+			using var list = new RecyclableList<object>(dataCount);
+			for (var i = 0; i < dataCount; i++)
+			{
+				list.Add(data[i]);
+			}
+		}
+
+		//[Benchmark]
+		public void RecyclableList_GetItem()
+		{
+			var data = _testRecyclableList;
+			var dataCount = TestObjectCount;
+			for (var i = 0; i < dataCount; i++)
+			{
+				DoNothing(data[i]);
+			}
+		}
+
+		//[Benchmark]
+		public void RecyclableList_SetItem()
+		{
+			var data = _testRecyclableList;
+			var dataCount = TestObjectCount;
+			for (var i = 0; i < dataCount; i++)
+			{
+				data[i] = TestObjects[i];
+			}
+		}
+
+		//[Benchmark]
+		public void RecyclableList_Count()
+		{
+			var data = _testRecyclableList;
+			DoNothing(data.Count);
+		}
+
+		//[Benchmark]
+		public void RecyclableList_LongCount()
+		{
+			var data = _testRecyclableList;
+			DoNothing(data.LongCount);
+		}
+	}
+}