/usr/bin/ghc -prof -auto-all -o queens_prof queens.hsRun the profiling version for a board size of 10 with time -pT and space -hC profiling turned on:
queens_prof 10 +RTS -pT -hC
more queens_prof.prof hp2ps queens_prof.hp ghostview -orientation=seascape -scale=-2 queens_prof.ps &