[github](https://github.com/tiby312/twounordered) [crates.io](https://crates.io/crates/twounordered)
A crate that provides the user with two fast "vec-like" vecs that are backed by
a single vec. The caveat is that the operations like push and truncate
may rearrange the order of the other vec in an unspecified way.
Also provides a `retain_mut_unordered` function to both the regular `Vec` as well as
the two "vec-like" vecs provided by this crate.