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
Regards
Sam Woodhead
_______________________________________________
oss-devel mailing list
oss-devel@mailman.opensound.com
http://mailman.opensound.com/mailman/listinfo/oss-devel
