Originally Posted by Linuxhippy
sad that nobody answered with real-world benchmarks :-/
I turned on Composite and windows transparency/shadows in KDE. The speed is the same like for ordinary 2D. So if previously Composite was very slow and now there is no difference between composite on/off the speed up is obvious.
I feel light speed up in ordinary 2D too. However the difference is not so high like with Composite.
I do not use benchmarks. Real applications are the best benchmark.