My fixed background made scrolling the site very slow, what can I do to improve it?

Question

I changed the background of my discussion forum using the CSS below

http://forum.antinovaordemmundial.com

html {
    background: url(http://antinovao         


        

Answer 1

The issue is actually with the background-attachment fixed value if you change it to background-attachment: scroll for mobile devices it should fix the lag.