Cargo Features

[dependencies]
spartan-codec = { version = "0.1.0", default-features = false, features = ["parallel"] }
default = parallel

The parallel feature is set by default whenever spartan-codec is added without default-features = false somewhere in the dependency tree.

parallel default = 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.

rayon parallel