IDIV vs SHR.cs

gistfile1.txt

 public class Bench6
    {
        int div = 10;
        int by = 4;

        [Benchmark(Baseline = true)]
        public int Div()
        {
            var a = div;
            var b = by;

            int all = 0;
            all += a / b;
            all += a / b;
            all += a / b;
            all += a / b;
            all += a / b;
            all += a / b;
            all += a / b;
            all += a / b;
            return all;
        }

        [Benchmark]
        public int DivReduced()
        {
            var a = div;

            int all = 0;
            all += a / 4;
            all += a / 4;
            all += a / 4;
            all += a / 4;
            all += a / 4;
            all += a / 4;
            all += a / 4;
            all += a / 4;
            return all;
        }
    }