I'd like to use 'inverted colors' but zooming is not required. The zooming has performance issues; mouse cursor lags, etc.

Please separate High Contrast from "zoom->options..." to main Universal Access settings  naming it as "Invert Colors" or "Reverse Colors" or "High Contrast Colors" or whatever you deem fit.

I use xcalib

yum install xcalib

$ xcalib -a -i ; # change / invert colors

there is no performance hit with xcalib, whereas zoom+high contrast colors makes the desktop feel sluggish...

Please consider separating 'Colors' from 'Zoom' options for performance gain.

thanks.