List with resize Benchmark

list-with-size-benchmark.cs

#LINQPad optimize+
void Main()
{
	var summary = BenchmarkRunner.Run<ListCapacityPerformance>();
}

[MemoryDiagnoser]
public class ListCapacityPerformance
{

	[Params(2, 100, 1000, 10000, 100_000)]
	public int Size;

	[Benchmark]
	public void SizeDefined()
	{
		int itemsCount = Size;

		List<int> set = new List<int>(itemsCount);
		foreach (var i in Enumerable.Range(0, itemsCount))
		{
			set.Add(i);
		}
	}

	 

	[Benchmark]
	public void SizeNotDefined()
	{
		int itemsCount = Size;

		List<int> set = new List<int>();
		foreach (var i in Enumerable.Range(0, itemsCount))
		{
			set.Add(i);
		}
	}
}