title: pop or add esp, 4 ? What is the difference?
body: <p>I saw <a href="https://stackoverflow.com/questions/2038416/smaller-instruction-than-add-esp-4">this</a> question, but I didn't find my answer in it..</p>
  
  <p>So, why would I prefer to use <code>add esp, 4</code> or <code>add esp, 8</code> instead of using <code>pop</code> one or two times? Is there any difference (performance, safety, etc.) at all or it's a matter of personal choice?</p>