Cargo Features
maxminddb has no features set by default.
[dependencies]
maxminddb = { version = "0.25.0", features = ["simdutf8", "mmap", "unsafe-str-decode"] }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.