For loop benchmarking in Unity

IterationTest

using UnityEngine;

public class IterationTest : MonoBehaviour {

	// Use this for initialization
	void Start () {
        const int count = 100000000;
        int[] a = new int[count];
        int total;
        var watch = new System.Diagnostics.Stopwatch();

        for (var i = 0; i < count; i++)
            a[i] = Random.Range(0, 100);

        total = 0;
        watch.Start();
        foreach (var i in a)
            total += i;
        watch.Stop();
        Debug.Log("foreach: " + watch.ElapsedMilliseconds);
        watch.Reset();

        total = 0;
        watch.Start();
        for (var i = 0; i < count; i++)
            total += a[i];
        watch.Stop();
        Debug.Log("for: " + watch.ElapsedMilliseconds);
        watch.Reset();

        total = 0;
        watch.Start();
        for (var i = count; --i >= 0;)
            total += a[i];
        watch.Stop();
        Debug.Log("reversed for: " + watch.ElapsedMilliseconds);
        watch.Reset();
    }

    // Update is called once per frame
    void Update () {
		
	}
}

foreach: 972
for: 742
reversed for: 566