title: Timing in Scheme
body: <p>I'm currently going through the <a href="http://projecteuler.net/" rel="noreferrer">Project Euler's</a> problems and I'm solving them both in C# and Scheme (the <a href="http://racket-lang.org/" rel="noreferrer">Racket</a> implementation). I know C# but I'm learning Scheme as I go along.</p>
  
  <p>Now, on top of having the correct results for the problems, I like to come up with the fastest possible solution I can think of. To that effect, in C# I use <a href="http://msdn.microsoft.com/en-us/library/system.diagnostics.stopwatch.aspx" rel="noreferrer">StopWatch</a> to measure the performance of my code. Is there a similar Scheme library / functionality to time code execution?</p>