On Tue, Jan 4, 2011 at 1:57 AM, Miles Bader <mi...@gnu.org> wrote: > Xan Lopez <x...@gnome.org> writes: >> I understand this can cause problems if, say, a file is removed from >> the build tree or so, but it's very different to removing completely >> dependency tracking (which indeed makes the null-build be essentially >> 0s). > > Do you know _what_ is taking so long? I mean, disk I/O (stats on a cold > disk cache), user CPU time (inefficient algos in make), system CPU time > (stats on a warm disk cache)...?
Are you talking about the time to process those empty rules that are gone if you get rid of -MP or of the remaining 20 seconds? Xan > > -Miles > > -- > `Cars give people wonderful freedom and increase their opportunities. > But they also destroy the environment, to an extent so drastic that > they kill all social life' (from _A Pattern Language_) >
