Cargo Features

systemstat has no features set by default.

[dependencies]
systemstat = { version = "0.2.4", features = ["serde"] }
serde = the_serde

Enables serde of bytesize and time

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.

the_serde serde?

Enables serde