Date: Wed, 7 Mar 2001 11:07:19 -0800 (PST) From: Mike Harding <mvh@ix.netcom.com> To: dillon@earth.backplane.com Cc: ggross@symark.com, steve@megahack.com, freebsd-stable@FreeBSD.ORG Subject: Re: ARCH flag in new make.conf Message-ID: <20010307190719.D5068113F72@netcom1.netcom.com> In-Reply-To: <200103071856.f27Iuxl71513@earth.backplane.com> (message from Matt Dillon on Wed, 7 Mar 2001 10:56:59 -0800 (PST)) References: <01C0A6F1.C26E6DC0.ggross@symark.com> <200103071856.f27Iuxl71513@earth.backplane.com>
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I've been bugging Kris about this for a while - I don't care about the
-march stuff, but the openssl optimizations are pretty much a
requirement when you have an SSL server... it doubles the RSA speed.
- Mike H.
Date: Wed, 7 Mar 2001 10:56:59 -0800 (PST)
From: Matt Dillon <dillon@earth.backplane.com>
Cc: Steven Farmer <steve@megahack.com>,
"freebsd-stable@FreeBSD.ORG" <freebsd-stable@FreeBSD.ORG>
Sender: owner-freebsd-stable@FreeBSD.ORG
X-Loop: FreeBSD.ORG
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:The impression I get is that when people use it, they usually end up
:complaining to the list about something not working, and then it is
:not immediately obvious that broken optimization routines are the problem. On
:the basis of a dialogue I read about 6 months ago on this list,
:I decided to avoid it like the plague until the current version of gcc
:stabilizes somewhat. Does that make sense, or am I being overly cautious?
I think you are being entirely sensible. I used to use -O2 all the time,
but as of about a year ago it started breaking things (starting with
the FreeBSD kernel). Then I started using -Os because I like the code
compaction it produced, but that started breaking the kernel too. Now I
just use -O (and -O had damn well better continue to work because my
static inlines will not compile properly without it!).
Now I just don't care any more, except for the 0.1% of my personal code
that I need to optimize, and most of that I optimize simply by playing
around with the C a little or changing an algorithm out or something like
that.
-Matt
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