IsNullOrEmpty and Trim vs IsNullOrWhitespace

string-isnullorempty-vs-isnullorwhitespace-trim.cs

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

[MemoryDiagnoser]
public class StringEmptyTrimPerformance
{
	private List<string> items;

	[Params(2, 100, 1000)]
	public int Lenght;


	[GlobalSetup]
	public void GlobalSetup()
	{
		string[] values = new string[] {"", string.Empty, "   ", "/n", null};
		
		Random rd = new Random();
		items = Enumerable.Range(0, Lenght)
			.Select(e => values.ElementAt( rd.Next(0, values.Length)))
			.ToList();
	}
	
	[Benchmark]
	public void UsingIsNullOrEmptyAndTrim()
	{
		for (int i = 0; i < items.Count; i++)
		{
			_ = string.IsNullOrEmpty( items[i]?.Trim());
		}
	}


	[Benchmark]
	public void UsingIsNullOrWhitespace()
	{
		for (int i = 0; i < items.Count; i++)
		{
			_ = string.IsNullOrWhiteSpace(items[i]);
		}
	}


}