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Date:      Thu, 18 Dec 2014 13:17:03 -0800
From:      Garrett Cooper <yaneurabeya@gmail.com>
To:        Warner Losh <imp@bsdimp.com>
Cc:        FreeBSD ARM <freebsd-arm@freebsd.org>, Robert Huff <roberthuff@rcn.com>, Dimitry Andric <dim@FreeBSD.org>, FreeBSD ports <freebsd-ports@freebsd.org>, FreeBSD-Current <freebsd-current@freebsd.org>
Subject:   Re: RFT: Please help testing the llvm/clang 3.5.0 import
Message-ID:  <18CDB8BF-C24E-442D-8904-5DB777E64A62@gmail.com>
In-Reply-To: <9D9850F8-62D6-4A85-BED3-1B4AB4DE5C14@bsdimp.com>
References:  <8598B1D4-5485-426F-B6D6-22BF26AC5FE1@FreeBSD.org> <CAGHfRMBPkQiTgW0Eahkoe1QwArBst-BZ-Lawor_CDda1x8K9xg@mail.gmail.com> <D9C5A8D1-2158-4B37-9C9C-067A4DDE6E44@FreeBSD.org> <21650.55288.425711.209975@jerusalem.litteratus.org> <E2670EBE-CD53-43D5-89EA-DC5460849BE5@FreeBSD.org> <9D9850F8-62D6-4A85-BED3-1B4AB4DE5C14@bsdimp.com>

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On Dec 18, 2014, at 6:51, Warner Losh <imp@bsdimp.com> wrote:

> With the recent parallelism work, the is true. It might save a couple =
percent
> off the build time. Before those changes, though, disabling all non =
target
> arches saved about 10% of the buildworld time.

I=92m curious. How much is 10% in terms of minutes and with what -j =
value?

> Creating a hack to do this is easy (which is how I measured it). But =
Dimitry
> is right that creating a robust solution is hard. Even harder if you =
want it
> to be completely clean.

It didn=92t seem incredibly hard =97 it just required a bit more =
=93generated files=94 in clang AFAICT. I=92ll hang ten until clang35 is =
in so I can re-asses what=92s going on with building it.

> I tend to agree. IMHO, supporting the work going on to bring the
> meta-mode stuff will pay far higher dividends than optimizing this
> corner of the build.

True=85 probably will!

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