C#

namespace RegexTest
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        List<string> _data;

        public Window1()
        {
            InitializeComponent();

            _data = new List<string>(500000);

            Random rand = new Random();
            byte[] data = new byte[4000];

            //int count = _data.Count;

            for (int i = 0; i < 50000; i++)
            {
                rand.NextBytes(data);
                _data.Add(Convert.ToBase64String(data));
            }
        }

        private void buttonTestRegex_Click(object sender, RoutedEventArgs e)
        {
            DateTime start = DateTime.Now;

            Regex regex = new Regex("99");
            int count = _data.Count;
            int match = 0;
            for (int i = 0; i < count; i++)
            {
                if (regex.IsMatch(_data[i]))
                {
                    match++;
                }
            }

            DateTime end = DateTime.Now;

            this.textBoxRegex.Text = (end - start).ToString();
        }

        private void buttonTestString_Click(object sender, RoutedEventArgs e)
        {
            DateTime start = DateTime.Now;

            int count = _data.Count;
            int match = 0;
            for (int i = 0; i < count; i++)
            {
                if (_data[i].Contains("99"))
                {
                    match++;
                }
            }

            DateTime end = DateTime.Now;

            this.textBoxString.Text = (end - start).ToString();
        }
    }
}

Contains : 507282
Regex : 882800

Contains : 535572
Regex : 876324

Contains : 491582
Regex : 876369

Contains : 464881
Regex : 884031

Contains : 529527
Regex : 877334

Contains : 545686
Regex : 878110

Contains : 560253
Regex : 933286

Contains : 587743
Regex : 869393

Contains : 550809
Regex : 862328

Contains : 581642
Regex : 871326

Contains : 578634
Regex : 878303

namespace RegexTest
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        List<string> _data;

        public Window1()
        {
            InitializeComponent();

            _data = new List<string>(50000);

            Random rand = new Random();
            byte[] data = new byte[4000];

            //int count = _data.Count;

            for (int i = 0; i < 50000; i++)
            {
                rand.NextBytes(data);
                _data.Add(Convert.ToBase64String(data));
            }
        }

        private void buttonTestRegex_Click(object sender, RoutedEventArgs e)
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            {

                Regex regex = new Regex("99");
                int count = _data.Count;

                int match = 0;

                for (int i = 0; i < count; i++)
                    match += regex.IsMatch(_data[i]) ? 1 : 0;

            }
            sw.Stop();

            this.textBoxRegex.Text = sw.Elapsed.ToString();
        }

        private void buttonTestString_Click(object sender, RoutedEventArgs e)
        {
            Stopwatch sw = new Stopwatch();

            sw.Start();
            {
                Regex regex = new Regex("99");
                int count = _data.Count;

                int match = 0;

                for (int i = 0; i < count; i++)
                    match += _data[i].Contains("99") ? 1 : 0;
            }
            sw.Stop();

            this.textBoxString.Text = sw.Elapsed.ToString();
        }
    }
}

this.textBoxRegex.Text = sw.Elapsed.ToString() + " " + match.ToString();

OriginalGriff wrote:

han a Regex if only because the Regex has to be parsed!

loyal ginger wrote:

I believe my answer to your previous question (http://www.codeproject.com/Messages/4243389/Re-csharp-windows-form-google-api-v3.aspx[^]) actually contains answer to this question. Check the first half of that answer for more information.

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