Cargo Features

[dependencies]
s2n-quic-xdp = { version = "0.51.0", default-features = false, features = ["tokio"] }
default = tokio

The tokio feature is set by default whenever s2n-quic-xdp is added without default-features = false somewhere in the dependency tree.

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.

tokio default