title: C++ performance, for versus while
body: <p>In general (or from your experience), is there difference in performance between for and while loops?</p>
  
  <p>What if they are doubly/triply nested?</p>
  
  <p>Is vectorization (SSE) affected by loop variant in g++ or Intel compilers?</p>
  
  <p>Thank you</p>