Lib.rs

Cargo Features

[dependencies]
id-arena = { version = "2.2.1", default-features = false, features = ["std", "rayon"] }

default = std

The std feature is set by default whenever id-arena is added without default-features = false somewhere in the dependency tree.

std default

Features from optional dependencies

rayon implicit feature

Enables rayon

rayon:

Simple work-stealing parallelism for Rust