parallel builds revisited

Coleman Kane cokane at
Thu Apr 12 21:39:42 UTC 2007

On Thu, 2007-04-12 at 21:07 +0200, Benjamin Lutz wrote:
> On Thursday 12 April 2007 11:06, Garrett Cooper wrote:
> > I dunno how you want to approach this, but gmake does recommend 2
> > jobs be run in parallel for HTT enabled chips, and 3 or 4 jobs for a
> > dual core machines.
> > -Garrett
> So far the approach is one job per CPU. I'll do some benchmarks lateron 
> to determine wether it really helps to run more jobs. For the KDE 
> ports, my gut feeling is that the improvement would be negligible. I'll 
> have to evaluate non-C++ ports like gnome-*, where the compilation time 
> per file is shorter.
> Of course, to make proper use of distcc, at least #cores + 1 jobs are 
> required. I'll keep that in mind.
> Cheers
> Benjamin

I have always seen that NCPUS+1 was a good heuristic.

Coleman Kane

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