Cargo Features

IStr has no features set by default.

[dependencies]
istr = { version = "0.1.0", features = ["cache-utf8"] }
cache-utf8 = simdutf8

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.

simdutf8 cache-utf8?