src/csharp/Grpc.Core/Utils/BenchmarkUtil.cs

#region Copyright notice and license

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#endregion

using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Threading.Tasks;

namespace Grpc.Core.Utils
{
    public static class BenchmarkUtil
    {
        /// <summary>
        /// Runs a simple benchmark preceded by warmup phase.
        /// </summary>
        public static void RunBenchmark(int warmupIterations, int benchmarkIterations, Action action)
        {
            var logger = GrpcEnvironment.Logger;
            
            logger.Info("Warmup iterations: {0}", warmupIterations);
            for (int i = 0; i < warmupIterations; i++)
            {
                action();
            }

            logger.Info("Benchmark iterations: {0}", benchmarkIterations);
            var stopwatch = new Stopwatch();
            stopwatch.Start();
            for (int i = 0; i < benchmarkIterations; i++)
            {
                action();
            }
            stopwatch.Stop();
            logger.Info("Elapsed time: {0}ms", stopwatch.ElapsedMilliseconds);
            logger.Info("Ops per second: {0}", (int)((double)benchmarkIterations  * 1000 / stopwatch.ElapsedMilliseconds));
        }
    }
}