Cargo Features

[dependencies]
viuwa = { version = "0.0.50", default-features = false, features = ["rayon"] }
default = rayon

The rayon feature is set by default whenever viuwa is added without default-features = false somewhere in the dependency tree.

rayon default

Enables rayon 1.5.*, rayon of ndarray and jpeg_rayon of image ^0.24.4

Because we don't want rayon to muck about the runtime if we don't have the feature enabled