Testing Octave 2.1.53 vs Matlab 6.1.0.450 (R12.1) for real ffts Testing fft( 512, 512) 5.10e-02 sec (1.17e+00) rerr 1.12e-14 XXXX Testing ifft( 512, 512) 8.70e-02 sec (1.14e+00) rerr 3.50e-14 XXXX Testing fft2( 512, 512) 8.35e-02 sec (4.08e-01) rerr 8.04e-15 Testing ifft2( 512, 512) 1.37e-01 sec (5.45e-01) rerr 1.43e-14 Testing fft( 513, 513) 1.33e-01 sec (1.28e+00) rerr 3.67e-14 XXXX Testing ifft( 513, 513) 1.76e-01 sec (1.05e+00) rerr 5.87e-14 XXXX Testing fft2( 513, 513) 1.98e-01 sec (8.27e-01) rerr 8.71e-14 Testing ifft2( 513, 513) 2.96e-01 sec (9.09e-01) rerr 1.12e-13 Testing fft( 514, 512) 8.60e-02 sec (5.99e-01) rerr 6.41e-14 Testing ifft( 514, 512) 1.61e-01 sec (9.58e-01) rerr 7.02e-14 Testing fft2( 514, 512) 1.21e-01 sec (6.29e-01) rerr 5.16e-14 Testing ifft2( 514, 512) 2.01e-01 sec (8.44e-01) rerr 3.37e-14 Testing fft( 512, 514) 5.00e-02 sec (1.06e+00) rerr 1.51e-14 XXXX Testing ifft( 512, 514) 8.65e-02 sec (1.13e+00) rerr 5.06e-14 XXXX Testing fft2( 512, 514) 1.15e-01 sec (3.97e-01) rerr 2.09e-14 Testing ifft2( 512, 514) 2.72e-01 sec (7.79e-01) rerr 2.25e-14 Testing fft(65536, 1) 1.95e-02 sec (5.74e-01) rerr 1.13e-14 Testing ifft(65536, 1) 3.40e-02 sec (5.62e-01) rerr 1.14e-14 Testing fft2(65536, 1) 2.10e-02 sec (6.00e-01) rerr 1.13e-14 Testing ifft2(65536, 1) 3.40e-02 sec (5.62e-01) rerr 1.14e-14 Testing fft( 1,65536) 1.95e-02 sec (5.74e-01) rerr 8.46e-15 Testing ifft( 1,65536) 3.40e-02 sec (5.67e-01) rerr 1.72e-14 Testing fft2( 1,65536) 3.50e-02 sec (1.01e+00) rerr 9.25e-15 Testing ifft2( 1,65536) 3.35e-02 sec (5.58e-01) rerr 1.72e-14 Testing Octave 2.1.53 vs Matlab 6.1.0.450 (R12.1) for complex ffts Testing fft( 512, 512) 4.80e-02 sec (7.87e-01) rerr 6.19e-14 Testing ifft( 512, 512) 6.50e-02 sec (8.12e-01) rerr 4.76e-14 Testing fft2( 512, 512) 9.75e-02 sec (4.44e-01) rerr 6.83e-14 Testing ifft2( 512, 512) 1.21e-01 sec (4.74e-01) rerr 4.62e-14 Testing fft( 513, 513) 1.30e-01 sec (8.90e-01) rerr 8.66e-14 Testing ifft( 513, 513) 1.54e-01 sec (9.39e-01) rerr 8.79e-14 Testing fft2( 513, 513) 2.43e-01 sec (8.71e-01) rerr 8.43e-14 Testing ifft2( 513, 513) 2.75e-01 sec (8.34e-01) rerr 4.71e-14 Testing fft( 514, 512) 1.27e-01 sec (8.64e-01) rerr 1.15e-13 Testing ifft( 514, 512) 1.48e-01 sec (8.60e-01) rerr 4.43e-14 Testing fft2( 514, 512) 1.70e-01 sec (8.67e-01) rerr 1.63e-13 Testing ifft2( 514, 512) 1.86e-01 sec (7.75e-01) rerr 1.08e-13 Testing fft( 512, 514) 4.60e-02 sec (7.60e-01) rerr 1.71e-14 Testing ifft( 512, 514) 6.80e-02 sec (8.50e-01) rerr 1.47e-14 Testing fft2( 512, 514) 2.31e-01 sec (7.54e-01) rerr 1.75e-13 Testing ifft2( 512, 514) 2.51e-01 sec (7.17e-01) rerr 1.20e-13 Testing fft(65536, 1) 2.70e-02 sec (4.70e-01) rerr 1.35e-14 Testing ifft(65536, 1) 3.10e-02 sec (5.08e-01) rerr 1.66e-14 Testing fft2(65536, 1) 2.80e-02 sec (4.91e-01) rerr 1.35e-14 Testing ifft2(65536, 1) 3.00e-02 sec (4.80e-01) rerr 1.66e-14 Testing fft( 1,65536) 2.80e-02 sec (4.96e-01) rerr 2.75e-14 Testing ifft( 1,65536) 3.10e-02 sec (5.12e-01) rerr 1.13e-14 Testing fft2( 1,65536) 2.75e-02 sec (4.78e-01) rerr 2.75e-14 Testing ifft2( 1,65536) 3.10e-02 sec (5.04e-01) rerr 1.13e-14 Testing Octave 2.1.53 vs Octave 2.1.50 for real ffts Testing fft( 512, 512) 5.10e-02 sec (5.96e-01) rerr 4.95e-11 Testing ifft( 512, 512) 8.80e-02 sec (9.89e-01) rerr 5.14e-11 Testing fft2( 512, 512) 8.25e-02 sec (4.45e-01) rerr 1.04e-13 Testing ifft2( 512, 512) 1.38e-01 sec (6.72e-01) rerr 1.04e-13 Testing fft( 513, 513) 1.33e-01 sec (8.08e-01) rerr 2.32e-13 Testing ifft( 513, 513) 1.75e-01 sec (9.33e-01) rerr 3.25e-13 Testing fft2( 513, 513) 1.97e-01 sec (7.46e-01) rerr 1.63e-13 Testing ifft2( 513, 513) 2.96e-01 sec (1.04e+00) rerr 1.68e-13 XXXX Testing fft( 514, 512) 8.70e-02 sec (5.26e-01) rerr 1.19e-12 Testing ifft( 514, 512) 1.63e-01 sec (8.81e-01) rerr 1.30e-12 Testing fft2( 514, 512) 1.20e-01 sec (6.20e-01) rerr 4.88e-13 Testing ifft2( 514, 512) 2.03e-01 sec (9.46e-01) rerr 4.68e-13 Testing fft( 512, 514) 5.10e-02 sec (5.96e-01) rerr 9.32e-13 Testing ifft( 512, 514) 8.80e-02 sec (9.78e-01) rerr 9.83e-13 Testing fft2( 512, 514) 1.14e-01 sec (4.20e-01) rerr 1.23e-13 Testing ifft2( 512, 514) 2.72e-01 sec (9.17e-01) rerr 1.06e-13 Testing fft(65536, 1) 1.90e-02 sec (4.58e-01) rerr 5.06e-14 Testing ifft(65536, 1) 3.45e-02 sec (7.50e-01) rerr 5.38e-14 Testing fft2(65536, 1) 1.95e-02 sec (4.02e-01) rerr 5.06e-14 Testing ifft2(65536, 1) 3.45e-02 sec (6.51e-01) rerr 5.38e-14 Testing fft( 1,65536) 1.95e-02 sec (4.70e-01) rerr 8.07e-14 Testing ifft( 1,65536) 3.40e-02 sec (7.39e-01) rerr 8.19e-14 Testing fft2( 1,65536) 3.50e-02 sec (7.29e-01) rerr 8.71e-14 Testing ifft2( 1,65536) 3.30e-02 sec (6.17e-01) rerr 8.19e-14 Testing Octave 2.1.53 vs Octave 2.1.50 for complex ffts Testing fft( 512, 512) 4.75e-02 sec (9.50e-01) rerr 2.78e-13 Testing ifft( 512, 512) 6.80e-02 sec (1.25e+00) rerr 2.89e-13 XXXX Testing fft2( 512, 512) 1.01e-01 sec (5.30e-01) rerr 2.37e-13 Testing ifft2( 512, 512) 1.17e-01 sec (5.63e-01) rerr 2.43e-13 Testing fft( 513, 513) 1.30e-01 sec (1.01e+00) rerr 2.03e-13 Testing ifft( 513, 513) 1.54e-01 sec (1.04e+00) rerr 1.94e-13 XXXX Testing fft2( 513, 513) 2.39e-01 sec (8.92e-01) rerr 3.01e-13 Testing ifft2( 513, 513) 2.72e-01 sec (9.60e-01) rerr 2.30e-13 Testing fft( 514, 512) 1.28e-01 sec (9.81e-01) rerr 2.10e-13 Testing ifft( 514, 512) 1.47e-01 sec (9.80e-01) rerr 2.39e-13 Testing fft2( 514, 512) 1.73e-01 sec (8.78e-01) rerr 1.05e-12 Testing ifft2( 514, 512) 1.86e-01 sec (8.61e-01) rerr 5.74e-13 Testing fft( 512, 514) 4.90e-02 sec (9.90e-01) rerr 3.94e-13 Testing ifft( 512, 514) 6.70e-02 sec (1.22e+00) rerr 3.61e-13 XXXX Testing fft2( 512, 514) 2.32e-01 sec (8.50e-01) rerr 1.80e-13 Testing ifft2( 512, 514) 2.51e-01 sec (8.58e-01) rerr 1.43e-13 Testing fft(65536, 1) 2.75e-02 sec (9.17e-01) rerr 9.92e-14 Testing ifft(65536, 1) 3.05e-02 sec (8.71e-01) rerr 1.45e-13 Testing fft2(65536, 1) 2.85e-02 sec (6.06e-01) rerr 9.92e-14 Testing ifft2(65536, 1) 3.10e-02 sec (6.02e-01) rerr 1.45e-13 Testing fft( 1,65536) 2.70e-02 sec (8.57e-01) rerr 1.58e-13 Testing ifft( 1,65536) 3.00e-02 sec (8.57e-01) rerr 1.41e-13 Testing fft2( 1,65536) 2.75e-02 sec (6.04e-01) rerr 1.58e-13 Testing ifft2( 1,65536) 3.10e-02 sec (5.96e-01) rerr 1.41e-13