Alan Gresley wrote:
> You are correct there Georg but it's when each dimension is squared
> that the slow down is noticed. The present image (bg.gif) is 4px by
> 4px. This could be fixed with an image of 4px in width and either
> 8px, 12px or 16px in height.
>
> It all about mathematics. :-)
Sure. I prefer to test though, and have gone through all relevant
browsers' rendering and re-rendering time for tiling and scrolling, for
years. Shape matters - especially in some browsers, but increased
image-size and reduced number of repetitions affect speed the most in IE
and Fx.
FWIW: latest observations for "smooth scrolling" on one fast and one
slow win-machine, are that Opera 9.26 scrolls only twice as fast as Fx2
and a bit faster than Fx3b when fed complex backgrounds - in most cases.
Opera 9.5b seems to be almost unaffected by what background it's fed,
and scrolls very fast.
I like to know how browsers handle these factors on regular web pages,
so I can optimize my own designs across the board.
regards
Georg
--
http://www.gunlaug.no
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