Fast Algorithms
For the implementation of a "fast" algorithm (similar to how FFT computes the DFT), it is often desirable that the transform length is also highly composite, e.g. a power of two. However, there are specialized fast Fourier transform algorithms for finite fields, such as Wang and Zhu's algorithm, which are efficient regardless of whether the transform length factors.
Read more about this topic: Discrete Fourier Transform (general)
Famous quotes containing the word fast:
“The wand is will; thou, fancy, saddle art,
Girt fast by memory; and while I spur
My horse, he spurs with sharp desire my heart;”
—Sir Philip Sidney (1554–1586)