Benchmarks for Three Different Machines

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Time in Milliseconds for FFTs of Arrays of Various Lengths

	2048K	1024K	512 K	256K	128K	64K	32K	16K
Sun Sparc Ultra30	1140	544	205	83	36	15	8	3
Intel Pentium Pro 200	2395	1064	502	240	106	37	14	6
Intel Pentium II 450	991	474	224	109	48	20	8	3
Intel Pentium III 500	890	423	201	96	43	18	7	3
DEC Alpha 300 XL with gcc/egcs	2909	1285	553	217	98	39	16	6
DEC Alpha 300 XL with the DEC OSF compiler	2737	1253	536	192	71	32	13	4
DEC Alpha 300 XL with the DEC OSF compiler and using the DXML library	2183	879	389	159	74	29	13	6
DEC Alpha 300 XL with the linux ccc compiler, cpml	2009	946	396	173	65	30	12	4
DEC Alpha 300 XL with the linux ccc compiler, cpml and using the cxml library	1932	896	419	192	71	29	12	7

NOTES:

• Numbers in blue are the number of elements in the array being FFTed. The letter K denotes 1024 elements, so 16K = 16384. Each element in the array is a floating point (4-byte) quantity.  Thus 256K = 256K floats = 1024 KBytes = 1 MByte of data.
• Numbers in black are the average time in msec for a FFT of the specified length.