Benchmark

sudo time cruft-ng ; sudo time cruft -> this way, all caches are initialized by cruft-ng, and "cruft" is not disavanteged

desktop AMD FX-6300 with 2445 packages:

6.43user 0.28system 0:06.58elapsed 101%CPU (0avgtext+0avgdata 53352maxresident)k
0inputs+33136outputs (0major+41106minor)pagefaults 0swaps

437.92user 49.60system 8:39.29elapsed 93%CPU (0avgtext+0avgdata 12552maxresident)k
24inputs+54160outputs (0major+29383123minor)pagefaults 0swaps

headless Raspberry Pi B with 702 packages:

18.48user 1.06system 0:20.23elapsed 96%CPU (0avgtext+0avgdata 8756maxresident)k
8inputs+2352outputs (1major+9598minor)pagefaults 0swaps

439.15user 48.02system 8:45.33elapsed 92%CPU (0avgtext+0avgdata 12544maxresident)k
16inputs+58824outputs (0major+29314481minor)pagefaults 0swaps

http://stackoverflow.com/questions/10035232/maximum-resident-set-size-does-not-make-sense