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Subject: Re: 7+ days of dogfood
From: Adrian Chadd <adrian@freebsd.org>
To: Fabian Keil <freebsd-listen@fabiankeil.de>
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Cc: Glen Barber <gjb@freebsd.org>, freebsd-current@freebsd.org,
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On 11 February 2013 09:45, Fabian Keil <freebsd-listen@fabiankeil.de> wrote:

>> You might also want to try MALLOC_PRODUCTION=1 in make.conf.  This took
>> my buildworld/buildkernel times from 35/15 minutes to 8/5 minutes,
>> respectively.
>
> I've been using MALLOC_PRODUCTION since before I started collecting
> build times and don't remember the impact, but I think the difference
> was less impressive than in your case and the massive slowdowns that
> are now supposed to be fixed only happened "recently" (after 2010)
> and thus never affected me. Thanks, though.

If you're running a recent multicore box with large quantities of very
fast RAM - no, you would've have seen it.

If you do a buildworld on a HT Atom CPU in a netbook .. holy crap do
you notice it.



Adrian