title: Can you optimise the Responsive Images Wordpress creates?
body: <p>I'm analyzing my site using Google PageSpeed Insights. It says "Properly formatting and compressing images can save many bytes of data." I've definitely done that as I'm uploading images that have been through <a href="https://tinypng.com/" rel="nofollow noreferrer">https://tinypng.com/</a>. </p>
  
  <p>I <em>think</em> it's WordPress causing the issue by generating various responsive images as the warning is related to a filename <code>-1024x525.png</code> which isn't the name of the file I uploaded.</p>
  
  <p>Is this the automatically generated WordPress responsive images? If so, is there a way to optimize them? Google seems to think I can save ~30% which would be awesome.</p>