Redo of the benchmarks

[Joshuaalbert]

It's now 2024 and numerous science projects rely on the FFT. This repo is the first thing that pops up when Google'ing FFT performance. I think it would be very useful to have the timing updated if that is within your bandwidth.

[wojdyr]

It's surprisingly nice of google, although for me, this repo is ranked at 4. :-)

I just had a quick search and I see that Intel has two libs now: MKL and IPP, and the fft-library topic has some libraries I haven't seen before (but I haven't spotted any among them that would claim top performance). Currently I'm not actively interested in the performance of FFT, so I'm afraid I'll leave making a new benchmark to someone else.

I've been thinking about benchmarking FFT in WebAssembly, but I don't know if I'll ever get around to doing it.