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-fomit-frame-pointer often gives a noticable speedup also... |
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Tuesday 18 June 2002 18.22 skrev Bart Verwilst: |
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> On Tuesday 18 June 2002 17:52, Dan Naumov wrote: |
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> || Hello. |
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> |
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> Hi! |
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> |
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> || I just thought I'd share an idea I had about stage3. I think it would be |
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> || nice if it was usable for systems older then i686 and if it used -O1 or |
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> || -O2 instead of -O3. The reasons are simple: |
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> || |
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> || The majority of the people who actually want to use stage3 do so because |
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> || of the time it takes to build the ENTIRE system from scratch. This |
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> || mainly applies to old PC's, which are obviously older then i686. I've |
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> || seen quite a few people on #gentoo complain that it is a major pain in |
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> || the ass to install Gentoo on an old system. |
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> |
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> Gentoo 1.3a is already available for both i586 and i686, and i think 1.3b |
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> will be available for even more archs.. not 100% sure which ones though.. |
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> Maybe i486, for the very low-end gateways out there :o) Others are k6, |
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> athlon, ... |
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> |
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> || As for -O1 / -O2 instead of the default -O3, it's just that some people |
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> || want to be "safe". I've had all kinds of weirnesses and unexplainable |
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> || crashes due to software compiled with -O3 and no other optimisations. |
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> || These problems always went away after a recompile with -O2. And I am |
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> || pretty sure I am not the only one who thinks that way, because many |
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> || people I know got "burned" when utilising heavy opts. |
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> |
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> Well, i maintain the gentoo 1.3 series of tarballs, and i think -O3 is what |
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> most of the people who want to download the tarballs want. -O3 is stable |
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> for the base system as far as i know, and the majority wants -O3.. I think |
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> if you want other flags than the ones in the tarball, just use stage2, and |
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> recompile it yourself.. At least that's my opinion on things.. IMHO -O3 |
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> isn't all that crazy for general use. |