Mmm.. 34 seconds for "./buildit clean ; ./buildit" on the Hijack tree, with none of it already in RAM. That's a complete build of two empeg kernels (Mk1, Mk2) from scratch.
EDIT: heh.. and doing it again afterward, with everything cached in RAM, also took 34 seconds.
I don't remember what it was before the SSD.. something like 90 seconds, I think.