Cargo Features

[dependencies]
bitpacking = { version = "0.9.2", default-features = false, features = ["bitpacker1x", "bitpacker4x", "bitpacker8x"] }
default = bitpacker1x, bitpacker4x, bitpacker8x

These default features are set whenever bitpacking is added without default-features = false somewhere in the dependency tree.

bitpacker1x default
bitpacker4x default
bitpacker8x default

Bitpacking has 4 features without comments.