bench.cs

    public class Bench92
    {
        [Benchmark(Baseline = true)]
        [MethodImpl(MethodImplOptions.NoInlining)]
        [Arguments(0)]
        public int A(int x)
        {
            try { _ = 1; } catch { }
            for (int i = 0; i < 1000; i++)
                x++;
            return x;
        }

        [Benchmark()]
        [MethodImpl(MethodImplOptions.NoInlining)]
        [Arguments(0)]
        public int B(int x)
        {
            try { _ = 1; } catch { }
            var y = x;
            for (int i = 0; i < 1000; i++)
                y++;
            return y;
        }
    }