CsvWriterBenchmarks.cs

using System;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using System.Linq;
using CsvHelper.Configuration;
using Xunit;

namespace CsvHelper.Tests
{
    public class CsvWriterBenchmarks
    {
        readonly Random random = new Random();

        TestRecord GenerateRandomTestRecord()
        {
            return new TestRecord
            {
                IntColumn = random.Next(),
                StringColumn = Path.GetRandomFileName(),
                FirstColumn = Guid.NewGuid().ToString()
            };
        }

        [Fact]
        public void WriteRecordsTest()
        {
            var records = Enumerable.Range(0, 100000).Select(_ => GenerateRandomTestRecord()).ToArray();

            Stopwatch sw;
            using (var stream = File.OpenWrite(@"W:\rdingwall\ignore.csv"))
            {
                using (var writer = new StreamWriter(stream))

                //var writer = new StreamWriter(stream, Encoding.Default, 8 * 1024 * 1024);
                //using (var writer = new StreamWriter(stream, Encoding.Default, 512 * 1024))
                using (var csv = new CsvWriter(writer))
                {

                    sw = Stopwatch.StartNew();

                    csv.WriteRecords(records);
                }
            }

            sw.Stop();

            Console.WriteLine(sw.Elapsed);
        }

        [TypeConverter("type name")]
        private class TestRecord
        {
            [CsvField(Index = 1, Name = "Int Column")]
            [TypeConverter(typeof(Int32Converter))]
            public int IntColumn { get; set; }

            [TypeConverter("String")]
            public string StringColumn { get; set; }

            [CsvField(Ignore = true)]
            public string IgnoredColumn { get; set; }

            [CsvField(Index = 0)]
            public string FirstColumn { get; set; }

            [TypeConverter(typeof(TestTypeConverter))]
            public string TypeConvertedColumn { get; set; }
        }

        private class TestTypeConverter : TypeConverter
        {
            public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
            {
                return "test";
            }
        }
    }
}