Update noise.rs

[Tuurlijk]

Add brown noise generator

[Tuurlijk]

Is there a way I can benchmark the noise generators? I'm quite new to cargo bench, so I could use some pointers.

[ErikNatanael]

Thank you!

Is there a way I can benchmark the noise generators? I'm quite new to cargo bench, so I could use some pointers.

Yes, using KnystOffline is the easiest way:
https://github.com/ErikNatanael/knyst/blob/84416fe2bacee0305b7bfd1d87043a32aa06d6a5/knyst/src/gen/osc.rs#L577C1-L591C67
And add a Criterion benchmark, see
https://github.com/ErikNatanael/knyst/blob/main/knyst/benches/large_sine_graph.rs
I haven't updated that benchmark to use KnystOffline though.

One caveat is that runtime performance is often different from micro benchmarks so for a more real world test you could create an example binary and look at real CPU usage, at what point you're starting to hit xruns etc. I'm sure there are better ways as well.