using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Diagnosers;
using BenchmarkDotNet.Running;
using System.Text.RegularExpressions;

public class Program
{
    static void Main(string[] args) => BenchmarkSwitcher.FromAssemblies(new[] { typeof(Program).Assembly }).Run(args);
}

[MemoryDiagnoser]
public class Regexes
{
    [Params(RegexOptions.None, RegexOptions.Compiled)]
    public RegexOptions Options { get; set; }

    private Regex _email, _date, _ip, _uri;

    private const string EmailPattern = @"^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,12}|[0-9]{1,3})(\]?)$";
    private const string DatePattern = @"\b(?<month>\d{1,2})/(?<day>\d{1,2})/(?<year>\d{2,4})\b";
    private const string IPPattern = @"(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9])\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9])";
    private const string UriPattern = @"[\w]+://[^/\s?#]+[^\s?#]+(?:\?[^\s#]*)?(?:#[^\s]*)?";

    [GlobalSetup]
    public void Setup()
    {
        _email = new Regex(EmailPattern, Options);
        _date = new Regex(DatePattern, Options);
        _ip = new Regex(IPPattern, Options);
        _uri = new Regex(UriPattern, Options);
    }

    [Benchmark] public void Email() => _email.IsMatch("yay.performance@dot.net");
    [Benchmark] public void Date() => _date.IsMatch("Today is 11/18/2019");
    [Benchmark] public void IP() => _ip.IsMatch("012.345.678.910");
    [Benchmark] public void Uri() => _uri.IsMatch("http://example.org");

    [Benchmark] public void EmailStatic() => Regex.IsMatch("yay.performance@dot.net", EmailPattern, Options);
    [Benchmark] public void DateStatic() => Regex.IsMatch("Today is 11/18/2019", DatePattern, Options);
    [Benchmark] public void IPStatic() => Regex.IsMatch("012.345.678.910", IPPattern, Options);
    [Benchmark] public void UriStatic() => Regex.IsMatch("http://example.org", UriPattern, Options);

    [Benchmark] public void Ctor() => new Regex(@"(^(.*)(\(([0-9]+),([0-9]+)\)): )(error|warning) ([A-Z]+[0-9]+) ?: (.*)", Options);
}