fft: complex-data, 1D transforms
	genial float	fftw estimate float	fftw measure float	genial double	fftw estimate double	fftw measure double
2	91	77	-1	105	85	-1	
4	358	300	-1	405	313	-1	
8	885	680	-1	939	747	-1	
16	1687	1201	-1	1528	1394	-1	
32	2520	2167	-1	1953	1814	-1	
64	3089	2353	-1	2045	1442	-1	
128	3362	2812	-1	281	1649	-1	
256	626	2976	-1	542	1647	-1	
512	1167	3121	-1	1230	1686	-1	
1024	2644	3128	-1	973	1655	-1	
2048	2141	3249	-1	909	1723	-1	
4096	2057	2510	-1	787	1343	-1	
8192	1944	2352	-1	630	919	-1	
16384	1567	1657	-1	471	703	-1	
32768	1101	1290	-1	334	467	-1	
65536	891	965	-1	220	220	-1	
131072	472	401	-1	241	227	-1	
262144	526	534	-1	260	330	-1