Collision-resistant ids optimized for horizontal scaling and sequential lookup performance, written in Elixir.
For full rationale behind CUIDs refer to the main project site.
Add Cuid as a dependency in your mix.exs
file:
defp deps do:
[{:cuid, "~> 0.1.0"}]
end
Run mix deps.get
to fetch and compile Cuid. It works as a process
{:ok, pid} = Cuid.start_link
Cuid.generate(pid) # => ch72gsb320000udocl363eofy
Each CUID is made by the following groups: c - h72gsb32 - 0000 - udoc - l363eofy
c
identifies this as a cuid, and allows you to use it in html entity ids. The fixed value helps keep the ids sequential.h72gsb32
is a timestamp0000
is a counterudoc
is a fingerprint. The first two characters are based on the process ID and the next two are based on the hostname. This is the same method used in the Node implementationl363eofy
random (uses:random.uniform
)
- Optimize (it takes 15s to run 200000 generations in my MBP)
- Lucas Duailibe
- Eric Elliott (author of original JavaScript version)