19 Sep 2011
All measurements in seconds for 10000 repetitions. Run on Beagleboard-XM clocked at 900 MHz (no RunFast). Compiled using -O2 -march=armv7-a -ffast-math -fPIC -mfloat-abi=softfp -mfpu=neon.
| length (N) | ooura | djb | kiss | libav | fftw2 | fftw3 | fftw3/neon | fftw3/new |
| 2048 | 10.22 | 11.56 | 14.2 | 1.0 | 10.92 | 16.16 | 2.82 | 2.87 |
| 1024 | 4.5 | 5.2 | 5.61 | 0.46 | 5.11 | 7.22 | 1.16 | 1.16 |
| 512 | 2.07 | 2.3 | 2.98 | 0.2 | 2.59 | 2.89 | 0.36 | 0.34 |
| 256 | 0.88 | 1.0 | 1.12 | 0.08 | 1.01 | 1.12 | 0.12 | 0.11 |
| length (N) | ooura | djb | kiss | libav | fftw2 | fftw3 | fftw3/neon | fftw3/new |
| 2048 | 5.37 | - | 6.91 | 0.7 | 4.71 | 7.37 | 7.38 | 7.38 |
| 1024 | 2.49 | - | 3.45 | 0.32 | 2.19 | 3.14 | 3.13 | 3.13 |
| 512 | 1.09 | - | 1.43 | 0.2 | 1.09 | 1.2 | 1.2 | 1.2 |
| 256 | 0.49 | - | 0.72 | 0.08 | 0.41 | 0.46 | 0.46 | 0.47 |
oourafft (as of 2006/12/28) is free and available at http://www.kurims.kyoto-u.ac.jp/~ooura/fft.html.
djbfft is available at http://cr.yp.to/djbfft.html.
kissfft is under BSD license and available at http://sourceforge.net/projects/kissfft/.
fftw2 is GPL licensed (version 2.1.5), available at http://www.fftw.org/.
fftw3 is GPL licensed (version 3.2.2).
fftw3/neon is based on fftw 3.2.2 and has
ARM/NEON patches added.
fftw3/new is GPL licensed (version 3.3.1-beta) and has ARM/NEON support.
posted at: 14:00 | path: /programming | permanent link