[FFmpeg-cvslog] r22052 - in trunk/libavcodec: h264.c h264.h

[Måns Rullgård]

Michael Niedermayer <michaelni at gmx.at> writes:

> On Thu, Feb 25, 2010 at 10:49:18PM +0100, Michael Niedermayer wrote:
>>     -On Thu, Feb 25, 2010 at 07:55:36PM +0000, M?ns Rullg?rd wrote:
>> > Michael Niedermayer <michaelni at gmx.at> writes:
>> > 
>> > > On Thu, Feb 25, 2010 at 07:20:18PM +0000, M?ns Rullg?rd wrote:
>> > >> Michael Niedermayer <michaelni at gmx.at> writes:
>> > >> 
>> > >> > sorry again, ill try not to forget svq3 from now on when compiling with
>> > >> > disabled dependancies. (enabling deps is no option as its too slow)
>> > >> 
>> > >> Can you please elaborate on that?  If you disable deps, you _will_
>> > >> miss things like this.  I'm not aware of any case where more than
>> > >> necessary gets recompiled.
>> > >
>> > > add a comment to avcodec.h, bump minor api version, ...
>> > > there are many things that cause quite a bit to be recompiled
>> > 
>> > It's hard to track dependencies other than by file, so yes, that would
>> > trigger some superfluous rebuilds.  However, this change was only to
>> > h264.h.  Nothing irrelevant depends on it.
>> > 
>> > > was there some way to quickly enable/disable deps?
>> > > currently i have common.mak hacked to achive it, but i faintly remember
>> > > some discussions about it ...
>> > 
>> > make DEPS=n
>> 
>> Thanks ill try to build with deps from now on before or immedeatly after
>> a commit so such hour long breakage does not reoccur
>> 
>> 
>> > 
>> > Before anyone asks, this is a hack that should not be documented.  I
>> > don't want to deal with the trouble reports that would ensue.
>> > 
>> > > also is there some way by which make would display what it would rebuild
>> > > without doing a time consuming rebuild? (had i run this with deps i would
>> > > have spot svq3)
>> > 
>> > make -n
>> 
>> not readable at all without filtering it though sed or other
>> btw here it take 7-11 seconds, which isnt exactly fast.
>
> and thats without deps 
> with deps its 21 seconds
>
> and while my pentium dual does it in 2 secs with deps and 1.3 without i
> still think this is ridiculously slow for what it does

On my computers it takes but a fraction of a second.  What filesystem
are you using?  Is it any quicker with make -r?

-- 
M?ns Rullg?rd
mans at mansr.com