Hash iteration tester

Program.cs

// First:
// dotnet add package BenchmarkDotNet
// Run like this:
// dotnet run -c Release


using System.Security.Cryptography;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;


BenchmarkRunner.Run<TestHashIterations>();

public class TestHashIterations
{
    private byte[] byteArray;

    [Params(3, 4, 5, 6, 7)]
    public int IterationExponent { get; set; }

    [GlobalSetup]
    public void Setup()
    {
        byteArray = new byte[32]; // I am assuming a 32-character API key - you will want to change this to match your key length
        var random = new Random();
        random.NextBytes(byteArray);
    }

    [Benchmark]
    public byte[] Hash() => Hasher.HashByteArrayWithIterations(byteArray, (int)Math.Pow(10, IterationExponent));

}



public static class Hasher

{


    public static byte[] HashByteArrayWithIterations(byte[] byteArray, int totalIterationCount)
    {
        using (var sha256 = SHA256.Create())
        {
            for (int iterationCount = 0; iterationCount < totalIterationCount; iterationCount++)
            {
                byteArray = sha256.ComputeHash(byteArray);
            }

            return byteArray;
        }
    }

}