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Date: Mon, 27 Jul 2015 15:14:55 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: David Chisnall <David.Chisnall@cl.cam.ac.uk>
Cc: Matthias Apitz <guru@unixarea.de>, freebsd-current@freebsd.org
Subject: Re: duration of buildworld
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On Mon, Jul 27, 2015 at 01:06:15PM +0100, David Chisnall wrote:

> On 27 Jul 2015, at 13:00, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote:
> > 
> > May be swap trashing on clang compilation?
> 
> 4GB ought to be enough for building clang with -j2.  A few of the
> template-heavy files can use 500+MB of RAM compiling and linking
> with BFD ld can easily hit 1GB (a lot more for a debug build - don't
> try this on a 32-bit system!).

I am try building 9.x with lot of memory and see about 1GB consumption
when comiling (not linking) four clang library. I am don't know how
clang in head consumption memory with self-compilation. And we don't
know about available memory at this system (may be firefox runing?)