cuid.py

Implementation of https://github.com/ericelliott/cuid in Python.

A cuid is a portable and sequentially-ordered unique identifier designed for horizontal scalability and speed -- this version is ported from the reference implementation in Javascript.

NOTE: Particularly if you have security concerns, the cuid standard has been deprecated in favor of cuid2!

Tested on CPython 2.7, 3.6-3.11 as well as PyPy & PyPy3.

Rough benchmarks on my machine (i7-8750H CPU @ 2.20GHz) using setup.py bench (which times the creation of 1 million cuids):

| Version | ns / cuid | | -------------------------- | --------- | | CPython 3.7.3 | 6095.257 | | CPython 3.6.8 | 6846.050 | | CPython 3.5.6 | 6604.012 | | CPython 2.7.16 | 6913.681 | | PyPy 7.1.1 (Python 2.7.13) | 326.344 | | PyPy3 7.1.1 (Python 3.6.1) | 562.673 |

(Note that timing the creation of fewer IDs changes the way PyPy runs the code, because of JIT warmup -- obviously creating this many IDs takes advantage of the warmed JIT)

For now, this has no dependencies outside the standard library -- in time this may change, to provide better random numbers and / or performance.