title: Inline Function Arguments Passing
body: <p>Is there a need <em>performance</em>-wise for <em>inline</em> functions to pass its arguments by <em>const reference</em> like</p>
  
  <pre><code>foo(const T &amp; a, const T &amp;b)
  </code></pre>
  
  <p>compared to by value</p>
  
  <pre><code>foo(T a, T b)
  </code></pre>
  
  <p>if I don't change the values of a and b in the function? Does C++11 change recommend anything specific here?</p>