This is a Rust implementation of the ulid project which provides Universally Unique Lexicographically Sortable Identifiers.

use ulid::Ulid;
// Generate a ulid
let ulid = Ulid::new();
// Generate a string for a ulid
let s = ulid.to_string();
// Create from a String
let res = Ulid::from_string(&s);
assert_eq!(ulid, res.unwrap());

• std (default): Flag to toggle use of std and rand. Disable this flag for #[no_std] support.
• serde: Enables serialization and deserialization of Ulid types via serde. ULIDs are serialized using their canonical 26-character representation as defined in the ULID standard. An optional ulid_as_u128 module is provided, which enables serialization through an Ulid's inner u128 primitive type. See the documentation and serde docs for more information.
• uuid: Implements infallible conversions between ULIDs and UUIDs from the uuid crate via the std::convert::From trait.

Benchmarks were run on my desktop (Win 10/WSL2 Ubuntu; Ryzen 7 5950x). Run them yourself with cargo bench.

test bench_from_string        ... bench:          13 ns/iter (+/- 0)
test bench_from_time          ... bench:          13 ns/iter (+/- 0)
test bench_generator_generate ... bench:          29 ns/iter (+/- 0)
test bench_new                ... bench:          31 ns/iter (+/- 1)
test bench_to_str             ... bench:           7 ns/iter (+/- 0)
test bench_to_string          ... bench:          19 ns/iter (+/- 0)