Cargo Features

[dependencies]
finalfusion = { version = "0.18.0", default-features = false, features = ["memmap"] }
default = memmap

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

memmap default = memmap2

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.

memmap2 memmap