PerformanceTestRunner.cs

//  This file is part of YamlDotNet - A .NET library for YAML.
//  Copyright (c) Antoine Aubry and contributors
    
//  Permission is hereby granted, free of charge, to any person obtaining a copy of
//  this software and associated documentation files (the "Software"), to deal in
//  the Software without restriction, including without limitation the rights to
//  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
//  of the Software, and to permit persons to whom the Software is furnished to do
//  so, subject to the following conditions:
    
//  The above copyright notice and this permission notice shall be included in all
//  copies or substantial portions of the Software.
    
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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//  SOFTWARE.

using System;
using System.Diagnostics;
using System.IO;
using System.Linq;

namespace YamlDotNet.PerformanceTests.Lib
{
    public class PerformanceTestRunner
    {
        private const int _defaultIterations = 10000;

        public void Run(ISerializerAdapter serializer, string[] args)
        {
            var iterations = args.Length > 0
                ? int.Parse(args[0])
                : _defaultIterations;

            var adapterName = serializer.GetType().Namespace.Split('.').Last();

            var tests = typeof(ISerializationTest).Assembly
                .GetTypes()
                .Where(t => t.IsClass && typeof(ISerializationTest).IsAssignableFrom(t))
                .Select(t => (ISerializationTest)Activator.CreateInstance(t));

            foreach(var test in tests)
            {
                Console.Write("{0}\t{1}\t", adapterName, test.GetType().Name);

                var graph = test.Graph;

                // Warmup
                RunTest(serializer, graph);

                if(!Stopwatch.IsHighResolution)
                {
                    Console.Error.WriteLine("Stopwatch is not high resolution!");
                }

                var timer = Stopwatch.StartNew();
                for (var i = 0; i < iterations; ++i)
                {
                    RunTest(serializer, graph);
                }
                var duration = timer.Elapsed;
                Console.WriteLine("{0}", duration.TotalMilliseconds / iterations);
            }
        }

        private void RunTest(ISerializerAdapter serializer, object graph)
        {
            var buffer = new StringWriter();
            serializer.Serialize(buffer, graph);
        }
    }
}