Le 18 déc. 08 à 02:35, Sam Woodhead a écrit : > Stéphane Letz wrote: >>> Code optimizations >>> ------------------------- >>> >>> In addition to MIDI I have done some modifications to the code that >>> handles audio format/rate conversions. It's now faster than in >>> earlier >>> version that performed the conversions with too short chunks >>> (increased >>> call/setup overhead). In particular there is significant improvement >>> under Solaris because I added proper compiler flags for better code >>> optimization (this cause problems earlier and it's possible that the >>> optimized code crashes in some cases). >>> >>> >> >> Hi, >> >> Not sure the optimization flags are good in : http:// >> mercurial.opensound.com/?rev/a15da9411856 >> >> As I understand "-fast" is a macro equivalent to several others >> flags: >> >> http://developers.sun.com/solaris/articles/options.html >> >> http://developers.sun.com/solaris/articles/amd64_migration.html#fast >> >> so using -xO2 and -fast at the same does not make much sense AFAICS >> >> Note also that -fast will produce target platform specific code (in >> the "Cons" section : The -fast option lets the compiler assume that >> the target platform the code will run on is the same platform on >> which it was compiled (because it includes -xtarget=native)) >> >> So it has to be used with care. >> >> Regards, >> >> Stephane Letz >> _______________________________________________ >> oss-devel mailing list >> oss-devel@mailman.opensound.com >> http://mailman.opensound.com/mailman/listinfo/oss-devel > > -fast includes -xO5 > > (You can see what it includes using the command below) > > echo 'int main (void) { return 0; }' > test.c > && cc -fast -xdryrun test.c
This is the point. Does it make sense to combine -xO2 and -fast that itself does - xO5 ?? Seems not... Regards Stephane Letz _______________________________________________ oss-devel mailing list oss-devel@mailman.opensound.com http://mailman.opensound.com/mailman/listinfo/oss-devel
