Additional benchmarks added to compare iterations over RecyclableList.

Recyclable.Collections.Benchmarks/RecyclableCollectionsBenchmarks.RecyclableList.cs

@@ -102,6 +102,118 @@ namespace Recyclable.Collections.Benchmarks
 			}
 		}
 
+		[Benchmark]
+		public void RecyclableList_GetItem_AsSpan()
+		{
+			var data = _testRecyclableList;
+			var dataCount = TestObjectCount;
+			int blockSize = data.BlockSize;
+			int nextItemBlockIndex = data.NextItemBlockIndex;
+			
+			var memoryBlocks = new Span<object[]>(data.MemoryBlocks, 0, data.LastTakenBlockIndex + 1);
+			for (var blockIndex = 0; blockIndex < nextItemBlockIndex; blockIndex++)
+			{
+				var memoryBlock = new Span<object>(memoryBlocks[blockIndex], 0, blockSize);
+				for (var itemIndex = 0; itemIndex < blockSize; itemIndex++)
+				{
+					DoNothing(memoryBlock[itemIndex]);
+				}
+			}
+
+			if (nextItemBlockIndex == data.LastTakenBlockIndex)
+			{
+
+				var memoryBlock = new Span<object>(memoryBlocks[nextItemBlockIndex], 0, data.NextItemIndex);
+				for (var itemIndex = 0; itemIndex < memoryBlock.Length; itemIndex++)
+				{
+					DoNothing(memoryBlock[itemIndex]);
+				}
+			}
+		}
+
+		[Benchmark]
+		public void RecyclableList_GetItem_AsArray()
+		{
+			var data = _testRecyclableList;
+			var dataCount = TestObjectCount;
+			int blockSize = data.BlockSize;
+			int nextItemBlockIndex = data.NextItemBlockIndex;
+
+			var memoryBlocks = data.MemoryBlocks;
+			for (var blockIndex = 0; blockIndex < nextItemBlockIndex; blockIndex++)
+			{
+				var memoryBlock = memoryBlocks[blockIndex];
+				for (var itemIndex = 0; itemIndex < blockSize; itemIndex++)
+				{
+					DoNothing(memoryBlock[itemIndex]);
+				}
+			}
+
+			if (nextItemBlockIndex == data.LastTakenBlockIndex)
+			{
+				var memoryBlock = memoryBlocks[nextItemBlockIndex];
+				blockSize = data.NextItemIndex;
+				for (var itemIndex = 0; itemIndex < blockSize; itemIndex++)
+				{
+					DoNothing(memoryBlock[itemIndex]);
+				}
+			}
+		}
+
+		[Benchmark]
+		public void RecyclableList_GetItem_AsForEach()
+		{
+			var data = _testRecyclableList;
+			var dataCount = TestObjectCount;
+
+			foreach (var item in data)
+			{
+				DoNothing(item);
+			}
+		}
+
+		[Benchmark]
+		public void RecyclableList_GetItem_AsWhile()
+		{
+			var data = _testRecyclableList;
+			int dataCount = TestObjectCount;
+			if (dataCount == 0)
+			{
+				return;
+			}
+
+			int blockSize = data.BlockSize;
+			int nextItemBlockIndex = data.NextItemBlockIndex;
+			int itemIndex = 0;
+			int blockIndex = 0;
+			var memoryBlocks = data.MemoryBlocks;
+			var memoryBlock = memoryBlocks[0];
+			while (blockIndex < nextItemBlockIndex)
+			{
+				DoNothing(memoryBlock[itemIndex]);
+				if (itemIndex + 1 < blockSize)
+				{
+					itemIndex++;
+				}
+				else
+				{
+					blockIndex++;
+					memoryBlock = memoryBlocks[blockIndex];
+					itemIndex = 0;
+				}
+			}
+
+			if (nextItemBlockIndex == data.LastTakenBlockIndex)
+			{
+				memoryBlock = memoryBlocks[nextItemBlockIndex];
+				blockSize = data.NextItemIndex;
+				while (itemIndex < blockSize)
+				{
+					DoNothing(memoryBlock[itemIndex++]);
+				}
+			}
+		}
+
 		//[Benchmark]
 		public void RecyclableList_SetItem()
 		{