linq

[CoreJob]
public class Linq_Bench
{
    float[] arr;

    [IterationSetup]
    public void IterationSetup()
    {
        arr = (new float[262144]).Select(x => 2.0f).ToArray(); //This is how you do this, right? ;)
    }

    [Benchmark]
    public float[] linqSelect()
    {
        return arr.Select(x => x * x).ToArray();
    }

    [Benchmark]
    public float[] loopInplace()
    {
        for(int i = 0; i < arr.Length; i++)
        {
            arr[i] = arr[i] * arr[i];
        }
        return arr;
    }
    [Benchmark]
    public float linqSum()
    {
        return arr.Sum(x => x * x);
    }
    [Benchmark]
    public float linqStupidSum()
    {
        float sum = 0;
        arr.Select(x => (sum += x * x)).ToList();
        return sum;
    }
    [Benchmark]
    public float loopSum()
    {
        float sum = 0;
        for (int i = 0; i < arr.Length; i++)
        {
            sum  += arr[i] * arr[i];
        }
        return sum;
    }
}