RecyclableCollectionsBenchmarks split into multiple files.

Recyclable.Collections.Benchmarks/Benchmarks/RecyclableCollections.Benchmarks.cs

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+using BenchmarkDotNet.Attributes;
+using Collections.Pooled;
+
+namespace Recyclable.Collections.Benchmarks
+{
+	[MemoryDiagnoser]
+	public partial class RecyclableCollectionsBenchmarks : BenchmarkBase
+	{
+		private object[] _testArray;
+		private RecyclableArrayList<object> _testRecyclableArrayList;
+		private RecyclableList<object> _testRecyclableList;
+		private PooledList<object> _testPooledList;
+
+		public PooledList<object> TestObjectsAsPooledList => _testPooledList ?? throw new NullReferenceException("Something is wrong and the field is not initialized");
+
+		[GlobalSetup]
+		public void Setup()
+		{
+			Console.WriteLine("******* GLOBAL SETUP RAISED *******");
+			_testObjects = EnumerateTestObjects().ToArray();
+			_testRecyclableArrayList = new(TestObjects, initialCapacity: checked((int)TestObjectCount));
+			_testRecyclableList = new(TestObjects, BlockSize, expectedItemsCount: checked((int)TestObjectCount));
+			_testArray = TestObjects.ToArray();
+			_testObjectsAsList = TestObjects.ToList();
+			_testObjectsAsRecyclableArrayList = TestObjects.ToRecyclableArrayList();
+			_testObjectsAsRecyclableList = TestObjects.ToRecyclableList();
+			_testPooledList = new PooledList<object>(TestObjects, ClearMode.Always);
+		}
+
+		private IEnumerable<object> EnumerateTestObjects()
+		{
+			for (long i = 0; i < TestObjectCount; i++)
+			{
+				yield return new object();
+			}
+		}
+
+		[GlobalCleanup]
+		public void Cleanup()
+		{
+			Console.WriteLine("******* GLOBAL CLEANUP *******");
+			_testRecyclableArrayList?.Dispose();
+			_testRecyclableList?.Dispose();
+			_testPooledList?.Dispose();
+			TestObjectsAsRecyclableArrayList?.Dispose();
+			_testObjectsAsRecyclableArrayList = default;
+			_testObjectsAsRecyclableList = default;
+			_testObjectsAsList = default;
+			_testObjects = default;
+		}
+	}
+}