title: PHP Composer Autoloading takes forever
body: <p>Whenever I run <code>composer update</code> the 'Generating autoload files' part always takes forever (sometimes up to 2 full minutes). I've ran it with the <code>--profile</code> flag to pinpoint this issue.</p>
  
  <p>I've read multiple articles on it, but I still can't understand why it takes this long on my projects, and if it's even useful for my projects?
  I'm running into this whenever I'm deploying changes live, and I want that deployment to be as fast as possible. 
  I've tried to run it with <code>--no-dev</code> flag, but that doesn't change anything.</p>
  
  <p>So my question is, why would autoloading take so long (and how could I improve its speed)?</p>