Baseline performance test

using System;
using System.Threading;
using System.IO;

class App
{
  static ReaderWriterLockSlim rw = new ReaderWriterLockSlim();
  static int reads = 0;
  static int writes = 0;

  static void Main()
  {
    for (int i = 0; i < 3; ++i)
    {
      new Thread(Reader).Start();
      new Thread(Writer).Start();
    }

    while(true)
    {
      Thread.Sleep(1000);
      int r = reads;
      int w = writes;
      Console.WriteLine("{0}\t{1}\r", r, w);
    }
  }

  static void Reader()
  {
    while(true)
    {
      double x = 0;
      rw.EnterReadLock();
      Interlocked.Increment(ref reads);
      for(int i = 1; i < 10; ++i) x += Math.Sqrt(i);
      rw.ExitReadLock();
    }
  }

  static void Writer()
  {
    while(true)
    {
      double x = 0;
      rw.EnterWriteLock();
      var w = Interlocked.Increment(ref writes);
      for(int i = 1; i < 10; ++i) x += Math.Sqrt(i);
      rw.ExitWriteLock();
    }
  }
}