Small Id

Small and fast collision resistant id generator

Q: Why? A: We wanted a fast and low maintenance, url friendly id generator.

Example

const smallId = require('small-id');

const id = smallId();

const getSafeId = async() => await smallId.safe();

Character pallet

Generator uses a pallet of URL friendly characters

Generation

• The ids are generated from the current timestamp with an appended 3 digit counter
• The counter increments with each call and reset when it hits 1000
• You should not use those ids for serious cryptographic purposes, since they can give away the timestamp at which they were generated.

A word about the collision resistance

In case of single source of generation the ids are:

• collision-resistant if you generate less than 1000 per second
• collision-proof if you use await smallId.safe()
• await smallId.safe() defers the generation process by a millisecond if the counter rolled over

In case of multiple sources of generation it's advised to also use a source identifier with the ids, then same rules as above apply.

License

License can be found here