Date: Fri, 12 Sep 2014 18:08:09 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: Andrew Berg <aberg010@my.hennepintech.edu> Cc: freebsd-questions@freebsd.org Subject: Re: Request Validation of my Experience in buildworld Message-ID: <alpine.BSF.2.11.1409121804360.96837@wonkity.com> In-Reply-To: <54135C19.8080701@my.hennepintech.edu> References: <54135498.8080202@comcast.net> <54135C19.8080701@my.hennepintech.edu>
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On Fri, 12 Sep 2014, Andrew Berg wrote: > On 2014.09.12 15:16, Dave Babb wrote: >> The WRKDIRPREFIX (from a answer I received in this mailing list), is so >> that my ports and kernel are built in ram and not to the SSD until they >> are complete. I have /usr/obj mounted in tmpfs.....I have 32Gb of >> ram....of which I only used 7% of tmpfs during any of the experiences >> below...... > ... >> Another dramatic drop in resources and another increase in performance. >> >> This experience was had across a desktop, and repeated on a ASUS laptop. >> >> Is this type of improvement typical? > Yes. Putting your WRKDIR in RAM eliminates the biggest bottleneck and puts > almost everything on the CPU, which is quite fast. You can use ccache to cache > objects and make future builds even faster by not rebuilding anything > unnecessarily. ccache does not help much or at all with Clang. Using NO_CLEAN can be even more effective, as long as /usr/obj is kept around.
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