Performance Related Question

[Warren Block]

On Wed, 27 Feb 2013, Frederico Costa wrote:

> On 2013-02-27 22:27, Michael Ross wrote:
>> If I read you right, you didn't ``make -jX buildworld'',
>> with X being the number of processes to spawn,
>> so you used just one core on either machine.
>> 
>> Buildworld does a lot of I/O, so disk speed is relevant.
>
> Yes, i just made "make buildworld".
>
> So i should use make -j2 on the S1(dual core) and -j4 on S2 (2xdualcore)?
>
> And it also makes sense what you say about the I/O.

It really depends on the system.  On my dual-core systems, I use 
devel/ccache and found that -j8 gave the best performance.