[wp-trac] [WordPress Trac] #65188: Uploading PNG images with a larger number of colors causes timeouts and eventually CPU starvation

WordPress Trac noreply at wordpress.org
Thu May 7 10:00:50 UTC 2026


#65188: Uploading PNG images with a larger number of colors causes timeouts and
eventually CPU starvation
---------------------------+------------------------------
 Reporter:  romainmrhenry  |       Owner:  (none)
     Type:  defect (bug)   |      Status:  new
 Priority:  normal         |   Milestone:  Awaiting Review
Component:  Upload         |     Version:  6.8
 Severity:  normal         |  Resolution:
 Keywords:                 |     Focuses:  performance
---------------------------+------------------------------

Comment (by blackstar1991):

 It looks like your pages are using very large image files. Unless your
 website is specifically a high-definition photo gallery or an art
 exhibition, images of this scale are generally unnecessary and can
 significantly slow down your site.

 Since most screens won’t even display those extra pixels, your users don't
 get the benefit of the large file size, but they do suffer the slower
 loading times. If you run a Google PageSpeed Insights test, you’ll likely
 see recommendations to "serve images in next-gen formats" or "properly
 size images."

 My Recommendation:
 I suggest compressing your images before uploading them to the site. A
 great free tool for this is [Squoosh.app | https://squoosh.app/], which
 allows you to reduce file size without losing noticeable quality.

 Note: This isn't a technical bug within the system; it’s a matter of
 optimizing your assets to ensure the best possible user experience.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/65188#comment:3>
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