ParamsBenchmark

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

namespace ParamsBench;

public class Program
{
    [Benchmark]
    public long ParamsArrayForEachTest()
        => ParamsArrayForEach(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40);

    [Benchmark]
    public long ParamsArraySumTest()
        => ParamsArraySum(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40);

    [Benchmark]
    public long ParamsROSpanTest()
        => ParamsROSpan(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40);

    [Benchmark]
    public long ParamsIEnumerableForEachTest()
        => ParamsIEnumerableForEach(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40);

    [Benchmark]
    public long ParamsIEnumerableSumTest()
        => ParamsIEnumerableSum(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40);

    private static long ParamsArrayForEach(params int[] values)
    {
        var result = 0L;
        foreach (var value in values) result += (long)value * 10;
        return result;
    }

    private static long ParamsArraySum(params int[] values)
        => values.Sum(n => (long)n * 10);

    private static long ParamsROSpan(params ReadOnlySpan<int> values)
    {
        var result = 0L;
        foreach (var value in values) result += (long)value * 10;
        return result;
    }

    private static long ParamsIEnumerableForEach(params IEnumerable<int> values)
    {
        var result = 0L;
        foreach (var value in values) result += (long)value * 10;
        return result;
    }

    private static long ParamsIEnumerableSum(params IEnumerable<int> values)
        => values.Sum(n => (long)n * 10);

    private static void Main()
    {
        _ = BenchmarkRunner.Run<Program>();
    }
}