Cargo Features

[dependencies]
procfile = { version = "0.2.1", default-features = false, features = ["rayon", "serde"] }
default = rayon

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

rayon default

Enables rayon, rayon of dashmap

serde

Enables serde, serde of dashmap

Procfile has 3 features without comments.