DOC: add pedalboard to benchmark page

[hagenw]

As suggested in faroit/python_audio_loading_benchmark#21 this adds pedalboard to the benchmarks as it provides the possibility to read and access WAV, FLAC, OGG, and MP3 files since version 0.5.0. It comes bundled with JUCE and does need external libraries.

For WAV, FLAC, OGG performance is very similar to what the libsndfile based solutions achieve:

For MP3 it is one of the fastest libraries for reading:

But where it really shines is accessing metadata (as this is not part of the benchmarking I have not tested if they are also correct):

/cc @psobot

[frankenjoe]

Wow, guess we have to take a look at pedalboard why they are that fast. At least for meta data, maybe also for reading mp3, and see if it is possible to adopt parts of it. I guess we want to avoid a direct dependency on pedalboard.

[psobot]

Hi! Great to see Pedalboard included here - thanks!

One question though, you mention:

It comes bundled with JUCE and does need external libraries.

Not sure about this part; JUCE is statically linked into Pedalboard as a native library, and Pedalboard shouldn't require any external Python or native dependencies at runtime except for numpy.

I also notice that Pedalboard's mp4 speed is not listed on the graphs above; it does have MP4 support, but only when running on macOS (via OS-level bundled libraries).