Cargo Features

[dependencies]
basu = { version = "0.1.5", default-features = false, features = ["sync", "async"] }
default = async

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

sync = rayon
async default = async-trait, futures, tokio

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.

async-trait async
futures async
rayon sync?
tokio async