-turn off the animations and the menus will open a lot faster
-Turn off the side image, transparency, drop shadows, the "last 5 programs" and subpixel hinting.
Desktop background
Use only single color or simple horizontal/vertical gradient for desktop background, with no wallpaper.
Using simple desktop background will reduce KDE startup time and memory usage.
Disabling various eye-candy features
Obviously, KDE without fading menus, transparency, animated icons and similar should run somewhat faster.
* How do I configure this?
o Open Control Center.
o Go to Appearance & Theme and click on Theme Manager.
o Find Customize your theme: at the bottom of the window. Click on Style.
o Choose tab Effects.
o Uncheck Enable GUI effects.
o Click OK.
o Hint: This change will only affect newly started applications.
Antialiasing
Having antialiasing (AA) turned on slows down drawing of texts, so you may consider turning it off in the control center, in the fonts module.
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