how to speed up mock?

hi, we use mock for local package build, but it's very slow. now we install a new host just for mock with 8core, ram disks etc. it seems it still slow. first of all most of the time mock use only one 1 core of the cpu. is there any way to speed up different part of the mock build process? thanks in advance. ps. anyway is there any better place to discuss it? -- Levente "Si vis pacem para bellum!"