On 23/11/04 14:56, "Pete Gregory" <[EMAIL PROTECTED]> wrote:
> Sorry if this is a liittle off topic. If it is, pointers in the right > direction greatfully appreciated > > A while back I knocked up some math benchmarks on my trusty G3 Pismo > under Metrowerks CodeWarrior (a somewhat out of date(vanilla C) version > which came out for 603/604e era)... and was pleasantly surprised to see > it performed these tasks faster than a Win2000 laptop (1GHz P4) and Sun > Ultra60. > > I've now upgraded to a G4/450 based Mac and purchased OSX which so far > is great. The old compiled code runs OK under classic. I tried > recompiling these benchmarks under gcc (& x-code) using the -O3 flag and > set up for a G4. The surprise is that these takes FIVE TIMES LONGER > when recompiled than the old code under classic. > > Are there any suggestions to better optimization flags etc or other > (preferably free/cheap) compilers out there? gcc is almost the only game in town, besides CodeWarrior. I've read a few times that it doesn't generate the fastest code. You have to carefully setup those flags in order to get the most out of it. Did you try this with a brand new Xcode project or a ProjectBuilder project updated to Xcode? Or was it an imported CodeWarrior project? If you haven't tried, I would suggest starting a brand new Xcode 'tool' project. You might also consider getting on Apple's email discussion list. There is an Xcode-related list and also and performance-optimization list. -Laurent. -- ======================================================================== Laurent Daudelin Developer, Multifamily, ESO, Fannie Mae mailto:[EMAIL PROTECTED] Washington, DC, USA ************************ Usual disclaimers apply *********************** -- G-Books is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Check our web site for refurbished PowerBooks | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> G-Books list info: <http://lowendmac.com/lists/g-books.html> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/g-books%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
