title: How do I record timestamps in a Mac OS X C++ program?
body: <p>I'm running a giant simulation / with a graphics engine.</p>
  
  <p>There are lots of events that are flying by.</p>
  
  <p>I would like to timestamp them (measured in milliseconds since the start of program execution).</p>
  
  <p>What should I be using for this? [What library?]</p>