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Abstract
The author shows that prime factor FFT algorithms offer little improvement over conventional FFT algorithms on computers such as the Cray-1 and Cyber 205 where the multiplications can be performed in parallel with the additions. A very modest gain may be obtained by using Good's algorithm (1958) with conventional small-n transforms. Winograd's technique (1978), despite its impressive reduction in the number of multiplications, is likely to be slower than the conventional algorithm, particularly on the Cray-1, where memory transfers will dominate the computation. 13 references.
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