[wissler]

This is not a "faster" FFT. It's not a FFT at all.

"Because the SFT algorithm isn't intended to work with all possible streams of data, it can take certain shortcuts not otherwise available. In theory, an algorithm that can handle only sparse signals is much more limited than the FFT."

It may well be a very useful algorithm that does FFT-like operations, but the title is marketing hype and it's impossible to judge the true range of applicability of this algorithm from the article alone.