public class Benchmark {
        Random rnd = new Random();

        [Benchmark]
        public int CustomFunction1() {
            int sum = 0;
            for (int i = 0; i < GetCustomValue(); i++) {
                sum += i;
            }
            return sum;
        }

        [Benchmark]
        public int CustomFunction2() {
            int sum = 0;
            for (int i = 0; i < GetCustomValue(i); i++) {
                sum += i;
            }
            return sum;
        }

        [MethodImpl(MethodImplOptions.NoInlining)]
        int GetCustomValue(int i) {
            int a = rnd.Next(i);
            return a > 1000 ? 100 : 10;
        }


        int GetCustomValue() {
            int a = rnd.Next(100);
            return a > 1000 ? 100 : 10;
        }
    }