using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

BenchmarkSwitcher.FromAssembly(typeof(Bench).Assembly).Run(args);

[MemoryDiagnoser(false)]
public class Bench
{
    const int Length = 100;

    private IEnumerable<int> _intsEnumerable = new Stack<int>(Enumerable.Range(0, Length));
    private Stack<int> _intsStack = new Stack<int>(Enumerable.Range(0, Length));
    private IEnumerable<string> _stringsEnumerable = new Stack<string>(Enumerable.Range(0, Length).Select(i => i.ToString()));
    private Stack<string> _stringsStack = new Stack<string>(Enumerable.Range(0, Length).Select(i => i.ToString()));

    [Benchmark]
    public int IntsEnumerable()
    {
        int sum = 0;
        foreach (var i in _intsEnumerable) sum += i;
        return sum;
    }

    [Benchmark]
    public int IntsStack()
    {
        int sum = 0;
        foreach (var i in _intsStack) sum += i;
        return sum;
    }

    [Benchmark]
    public int StringsEnumerable()
    {
        int sum = 0;
        foreach (var s in _stringsEnumerable) sum += s.Length;
        return sum;
    }

    [Benchmark]
    public int StringsStack()
    {
        int sum = 0;
        foreach (var s in _stringsStack) sum += s.Length;
        return sum;
    }
}