Cargo Features

PerformanceMark has no features set by default.

[dependencies]
performance-mark = { version = "0.3.0", features = ["derive_serde"] }
derive_serde

Enables derive of serde

serde:

Provide derive(Serialize, Deserialize) macros.

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.

serde derive_serde?