Lessons learned from source upgrade from FreeBSD i386 9.2 Stable to FreeBSD i386 10.0 Release.

[Thomas Hoffmann]

On Thu, Jan 23, 2014 at 9:56 AM, Warren Block <wblock at wonkity.com> wrote:
>
>
> Using -DNOCLEAN with an existing /usr/obj can go even faster than ccache:
> less than two minutes for a buildworld on my frequently updated i5/SSD
> system, sometimes less than one minute.


Can you elaborate on this, please? I always clear my /usr/obj before
starting a buildworld, which takes 2 hours to run on my system. Are you
saying if I do "make -DNOCLEAN buildworld" I do not have to clear /usr/obj
first AND my buildworld will run faster (AND with no downside)?

Thanks.
-Tom