Beman Dawes <bdawes@[...].org>  writes:

>  At 03:23 PM 9/20/2003, David Abrahams wrote:
>   >
>   >For those people running the Boost regression tests, I suggest you try
>   >invoking bjam with -jN to do some of the build jobs in parallel.  Even
>   >on uniprocessor systems it seems to help quite a bit to compile/link
>   >while some other process is waiting for the disk, and on
>   >multiprocessors I imagine it would be even better.  I am using -j4 on
>   >my uniprocessor laptop now, for example.
> 
>  I tried -jN a while ago when I got a hyperthreading CPU, and it did
>  seem to improve build speeds as long as GCC wasn't one of the
>  compilers.
> 
>  I didn't spend a lot of time diagnosing the problem with GCC, but what
>  seemed to have been happening was that GCC used so much memory that
>  running multiple compiles chewed up all the machine's RAM and
>  more. That kills file caching, which in turn kills performance.
> 
>  Did you try with GCC? 

Yep, but I wasn't measuring.  It just seemed faster.


-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com

_______________________________________________
Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost