make -jN

[Alain Cremieux]

>
>
>Just wanted to confirm that 'make -jN' should work with the current
>HEAD.  I just did a complete 'make -j3' on a dual-proc box here.
>
>Cheers,
>	Simon
>

A measurement :

On a Pentium 4, 2.4 Ghz, monoprocessor (!)

compiling 
http://www.haskell.org/ghc/dist/current/dist/ghc-6.3.20050122-src.tar.bz2, 
Linux 2.4.29

. with or without hyperthreading enabled  : 'make' takes 100mn
. with hyperthreading enabled : 'makes -j 3' takes 88mn 45s

A big win, I think.

Alain