Cargo Features

[dependencies]
rbase64 = { version = "2.0.3", default-features = false, features = ["cli", "parallel"] }
default = parallel

The parallel feature is set by default whenever rbase64 is added without default-features = false somewhere in the dependency tree.

cli = clap

Required by the binary

parallel default = rayon

Affects common::PARALLEL_THRESHOLD_BYTES, common::PARALLEL_BATCH_SIZE

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.

clap cli?
rayon parallel