>> sure, but it still runs faster if compiled to 64 bits in a 64 bit OS, right? >>
>why? The only thing I have to back this assumption up is a recollection of a message by miller to the list saying that tests with the 64 bit version showed it was running faster, but I don't know anything about it, really. Still trying to learn from you. I'd also suspect that a double precision in Pd would make it much slower, but the benchmarks from Katja didn;t point this out. Seems like some future version of Pd running in full double precision is not too crazy, huh? cheers 2015-02-01 19:08 GMT-02:00 IOhannes m zmölnig <[email protected]>: > On 02/01/2015 06:05 PM, Alexandre Torres Porres wrote: > >> > >> Seems Pd runs faster if compiled to 64 bits in a 64 bit OS than if it > were > >> compiled as 32, which does makes sense. That's all? > >> > > > > "*no : pd compiled for 64 bit system will not run on 32 bit sytem, and it > > will not load 32 bit externals.*" > > > > sure, but it still runs faster if compiled to 64 bits in a 64 bit OS, > right? > > > > why? > > if you run a 32bit binary on a 64bit OS, there might be some overhead > involved (bit then i really don't know much about the performance of > multi-arch systems) > > if you run a 32bit binary on a 32bit OS on a 64bit CPU (x86_64, which is > compatible with 32bit CPUs), then it might be slightly slower than > compared to a full 64bit system. > > > the real advantages are: > - memory access! > a 32bit application/OS uses 32bit pointers to access memory. this > limits the accessible memory to 4GB (your OS might be able to manage > more using PAE; but the application itself will have a maximum of 4GB.) > a 64bit application uses 64bit pointers to access memory. thats much > more as you are likely to ever see in your lifetime (but then: 2640k are > enough" anybody?) > > - modern OSs are 64bit (even the not-so-modern w32[sic!] has started to > become a 64bit system). > it seems silly to run 32bit applications on such systems (and a waste of > ressources, as you need to install a 32bit version the entire > runtime-environment) > > > also check out: http://en.wikipedia.org/wiki/64-bit_computing > > fgrsam > IOhannes > > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > >
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