It’s likely my web hosting provider that is slow. Speed test sites show that it takes 1.5 seconds before the first byte is received. Every attempt to make things faster using W3 cache or WP super cache or pagespeed ninja seem to give a reverse result. I finally modified the parallax.js jave script and fix programmed the banner dimensions into it. It’s an ugly solution but it does the trick. On mobile devices, I don’t see the issue. Parallax probably isn’t used when the site is displayed mobile.
So, now the google loading indicator keeps spinning right for 3 – 5 seconds, but the webpage becomes visible and responsive after 2 – 3 seconds. The banner picture doesn’t jump anymore once the page is fully loaded.
