title: Do I get a performance penalty when mixing SIMD instructions and multithreading
body: <p>I was interested in doing a proyect about face-recognition (to make use of SIMD instructions set). But during the first semester of the current year, I learnt something about threads and I was wondering if I could combine them.</p>
  
  <p>When should I avoid combining multithreading and SIMD instructions? When is it worth it to do it?</p>