Cargo Features

plonky2_maybe_rayon has no features set by default.

[dependencies]
plonky2_maybe_rayon = { version = "0.2.0", features = ["parallel"] }
parallel = rayon

Affects plonky2_maybe_rayon::MaybeParChunks, plonky2_maybe_rayon::MaybeParChunksMut, plonky2_maybe_rayon::join

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.

rayon parallel?