title: How to create a .pyd file?
body: <p>I'm creating a project that uses Python OpenCV. My image processing is a bit slow, so I thought I can made the code faster by creating a <code>.pyd</code> file (I read that somewhere).</p>
  
  <p>I am able to create a <code>.c</code> file using Cython, but how to make a <code>.pyd</code>? While they are a kind of <code>.dll</code>, should I make a <code>.dll</code> first and convert it? And I think they're not platform-independent, what are equivalents on Unix?</p>
  
  <p>Thanks for any help!</p>