title: Does Python type hint (annotations) cause some run-time effects?
body: <p>Can Python function annotations and type hints (<a href="https://www.python.org/dev/peps/pep-3107/" rel="noreferrer">PEP 3107</a> and <a href="https://www.python.org/dev/peps/pep-0484/" rel="noreferrer">PEP 484</a>) cause some run-time effects?</p>
  
  <p>Could it made the code faster? Or shrink the usage of memory? Or otherwise it would make code more slow?</p>