[Resolved] Smooth scroll speed

Hi
I use this for trying to speed up the “general” smooth scroll effect.

add_filter( ‘generate_smooth_scroll_duration’, ‘tu_smooth_scroll_duration’ );
function tu_smooth_scroll_duration() {
return 800; // milliseconds
}

But whatever I do it seem to be the same speed. Check out.

https://olle.dyndns-ip.com/luftskeppet/

its set to
return 100; // milliseconds

Seems the same as
return 800; // milliseconds

What to do?