On Mon, Mar 24, 2014 at 8:49 AM, Timbo <[email protected]> wrote: > Dear Group, > I'm comparing the speed of the BBB and Raspberry-Pi when running various > audio encoders. Normally the BBB wins by a factor of 2 or 3 as expected, > but in the case of oggenc (from the vorbis-tools package) the BBB is > actually slightly slower. I've tried recompiling the vorbis-tools package, > but I must be missing some optimisation. Can anybody give me a hint?
Does it use a crap-load of 'double'? Can you try the compiler flags "-ffast-math -fsingle-precision-constant -fshort-double" for both targets? http://forum.kde.org/viewtopic.php?f=74&t=117429 has some related background. The double vs. float is just a guess, but there aren't many reasons you'll see any code run close to as fast on a Pi as it does on a Bone. > > The BBB is running Robert C Nelson's Debian Wheezy image (2013-09-27 I > think) at 1000MHz and the RPi is running Raspbian (recompiled Debian Wheezy) > at 800MHz. > > Recompilation of vorbis-tools: > $ sudo apt-get build-dep vorbis-tools > $ sudo apt-get --build source vorbis-tools > $ sudo dpkg -i vorbis-tools_1.4.0-1_armhf.deb > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
