On Mon, Dec 03, 2007 at 11:33:54PM +0100, Jean-Marc Lasgouttes wrote: > Abdelrazak Younes <[EMAIL PROTECTED]> writes: > > >> The time for a null-build is more or less proportional to the number of > >> directories... > > > > Wasn't your cleanup in this area meant to avoid this slowdown? You > > could perhaps merge all Makfiles into one (the one in the top src/ > > directory). A bit like what is done with scons_manifest. > > Or take two of these pink pills and forget about this obsession with > null-build. Being so concerned about doing /nothing/ efficiently is a > bit strange...
The null-build time is almost half of the time to build LyX after a trivial change. I.e. with a warm cache I have: [EMAIL PROTECTED]:/suse/usr/src/lyx/build > time make real 0m4.114s user 0m3.840s sys 0m0.200s [EMAIL PROTECTED]:/suse/usr/src/lyx/trunk/src > touch boost.cpp [EMAIL PROTECTED]:/suse/usr/src/lyx/build > time make real 0m8.690s user 0m6.768s sys 0m1.440s So keeping this small _does_ matter. [And of course, the contribution of the nullbuild would be even larger without libtools...] Andre'
