title: WP REST API Slow performance retrieving 500+ posts
body: <p>I'm using the official WP REST API to retrieve posts. I want to retrieve all my posts (500+ posts). It takes longer than 1 minute to retrieve this!</p>
  
  <p>This is way way to long to use this API in a production environment. Anyone suggestions?</p>
  
  <p>I already tried W3 Total Cache with a JSON addition but without any improvements.</p>