It could just be the 3.1 MB image getting served from Apache. 3888 × 2592 might be a tiny bit too large for a preview image. They should take a look at mod_pagespeed…
It could just be the 3.1 MB image getting served from Apache. 3888 × 2592 might be a tiny bit too large for a preview image. They should take a look at mod_pagespeed…