Re: make doc problem

[Julien Rioux]

On 22/01/2012 2:38 PM, David Kastrup wrote:
> Julien Rioux<address@hidden>  writes:
>
> > I can't run -j, I have a single core.
>
> This is factually incorrect.  You can run -j just fine, but you can't
> expect much of a speedup.  On a single-core machine,
>
> make -j 2
>
> typically gives you a speedup of maybe 15% (given sufficient memory)
> since the CPU can keep busy on processing a second job when the other
> job is waiting for the disk to provide new input.
>
> More importantly, you'll get to see the same kind of problems that the
> true multi-core people experience when using -j.
>
> So very much recommended for testing.

Thanks, you're quite right CPU is not the limiting factor for the build. 
Disk access and usage of swap when compiling 
input/regression/collated-files slows down the build to a crawl for me.

--
Julien