Cargo Features

RKM has no features set by default.

[dependencies]
rkm = { version = "0.8.1", features = ["parallel"] }
parallel = ndarray-parallel, rayon

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

ndarray-parallel parallel?
rayon parallel?