Gentoo Archives: gentoo-user

From: Neil Bothwick <neil@××××××××××.uk>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] How to properly change CFLAGS ?
Date: Mon, 21 Aug 2006 21:23:56
Message-Id: 20060821221616.3de2f7eb@hactar.digimed.co.uk
In Reply to: [gentoo-user] How to properly change CFLAGS ? by "Stefan G. Weichinger"
1 On Mon, 21 Aug 2006 22:51:43 +0200, Stefan G. Weichinger wrote:
2
3 > Now I read about the fact that -O3 results in bigger binaries and isn't
4 > at all guaranteed to give me a faster system. The bigger files result in
5 > more load on IO, so this tells me that it puts the load on the
6 > (relatively slow) 5400 rpm HDD I have in my laptop. OTOH I have "only"
7 > 512 MB RAM in there so it seems interesting to me to go the -O2 way of
8 > doing Gentoo ...
9
10 I agree with Richard's response to the other other parts of your mail, but
11 I'd also add that -O2 may not be the best setting for your system. -Os
12 applies some of the optimisations of -O3 but also optimises for size. It
13 is often the best setting for systems with slow memory and disk I/O, i.e.
14 laptops.
15
16
17 --
18 Neil Bothwick
19
20 A bug in the hand is better than one as yet undetected.

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Re: [gentoo-user] How to properly change CFLAGS ? "Stefan G. Weichinger" <lists@×××××.at>