title: Idle time in frame rendering in Chrome DevTools
body: <p>When doing research on web render optimization, i've encountered a strange render behavior on many popular websites. Big part of frame render time is empty space with no operations. <a href="http://i.stack.imgur.com/L00lb.png" rel="noreferrer">Example from Apple promo page</a></p>
  
  <p>The only thing that operates in that timeframe is a GPU. I couldn't find any cause for this behavior. What could be the reason behind this issue and how can i improve render time of such frames in my projects?</p>