BenchmarkOutput-netcore1.1.md

BenchmarkDotNet=v0.10.5, OS=ubuntu 16.04
Processor=Intel Xeon CPU E5-2660 0 2.20GHz, ProcessorCount=2
Frequency=1000000000 Hz, Resolution=1.0000 ns, Timer=UNKNOWN
dotnet cli version=1.0.3
  [Host]     : .NET Core 4.6.25009.03, 64bit RyuJIT
  DefaultJob : .NET Core 4.6.25009.03, 64bit RyuJIT

Method	Mean	Error	StdDev
ProcessStarting	103.7 ms	1.290 ms	1.486 ms

BenchmarkOutput-netcore2.0.md

BenchmarkDotNet=v0.10.5, OS=ubuntu 16.04
Processor=Intel Xeon CPU E5-2660 0 2.20GHz, ProcessorCount=2
Frequency=1000000000 Hz, Resolution=1.0000 ns, Timer=UNKNOWN
dotnet cli version=2.0.0-preview2-005905
  [Host]     : .NET Core 4.6.25226.02, 64bit RyuJIT
  DefaultJob : .NET Core 4.6.25226.02, 64bit RyuJIT

Method	Mean	Error	StdDev	Median
ProcessStarting	88.75 ms	7.741 ms	22.21 ms	101.9 ms

Program.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Threading;
using System.Threading.Tasks;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

namespace long_running
{
    class Program
    {
         static void Main(string[] args)
        {
            var summary = BenchmarkRunner.Run<Test>();
            Console.Write(summary);
        }
    }

    public class Test
    {
        [Benchmark]
        public void ProcessStarting()
        {
            Process process;
            using(process = Process.Start("/bin/echo"))
            {
                process.WaitForExit();
            }
        }
    }
}