[FFmpeg-devel] Donations and what happens with them

[Diego Biurrun]

On Wed, Jan 26, 2011 at 06:13:09PM +0100, Michael Niedermayer wrote:
> On Wed, Jan 26, 2011 at 03:26:04PM +0100, Diego Biurrun wrote:
> > On Wed, Jan 26, 2011 at 03:12:36PM +0100, Michael Niedermayer wrote:
> > > On Wed, Jan 26, 2011 at 01:48:29PM +0100, Diego Biurrun wrote:
> > > > The impenetrability of the motion estimation code has already hampered
> > > > development of the CAVS encoder in the past, likely other things as
> > > > well.
> > > > 
> > > > Furthermore it slows down parallel builds by an insane amount.  If you
> > > > have a few cores available, compiling motion_est.c takes up more time
> > > > than all of the rest of libavcodec.  Thus all linking stages are
> > > > delayed and precious developer time wasted.
> > > 
> > > Iam thinking the build system recompiles far too much far too often
> > > Its caused by basing its design on "recompile everything that might in some
> > > corner case need it"
> > > a rule like "minimize the average time it takes a developer to build a
> > > working binary" would work better, id much prefer to have it rebuild just 10%
> > > of what it does for a 1% chance that i need to manually do a make distclean; make
> > > to get a fully working binary.
> > 
> > ccache is your friend.
> 
> i guess one could hack ccache to achive that

Seriously, have you tried ccache?  If yes, discard my comments as void,
but if not, you should.  It speeds up compilation enormously, especially
because compilation times for things that the build system defensively
schedules for recompilation just in case are pulled out of the cache
almost instantaneously if indeed the same code has been compiled in
this compilation environment already ...

Diego