CFS executes many times faster than the wrapper.
On a Sparc server 1000, a single trial took one cpu
unit or less to complete for all datasets except kr-vskp,
which averaged 8 cpu units. By comparison, the
wrapper ranged from 123 cpu units to complete one trial
on breast-cancer to over 9000 cpu units to complete one
trial on kr-vs-kp. The wrapper is cubic in the number
of features, whereas CFS is squared in the number of
features.