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On Sunday 04 December 2005 09:35, Dale wrote: |
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> Hi, |
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> |
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> I have been up and running a while and am running stable but this is |
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> Gentoo. ;) I found a script that tells you what your CFLAGS are |
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> suposed to be and it is different from what I am using. This is what I |
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> |
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> am using now, from make.conf of course: |
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> >CFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer" |
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> |
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> This is what the script said: |
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> >-march=athlon-xp -mfpmath=sse -msse -mmmx -m3dnow |
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> |
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> I assume I would have to add the-O3 to that though. |
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> |
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> I have a AMD XP 2500+ and 1GB of ram. I like it to run fast even if it |
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> takes longer to compile. I think that is where the -O3 comes in but be |
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> gentle if I am wrong. For those who may read this and not tell the |
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> difference, that is a minus sign, the letter O and the number three. |
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> |
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|
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O3 makes binaries much, much bigger. Bigger binaries need more cache&load |
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time. So bigger binaries are slower a lot of time. |
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-fomit-frame-pointer is fine, fmpgmath=sse may or may not make your apps |
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slower or faster. msse, mmmx, m3dnow are (mostly) harmless. |
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-- |
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