Choosing a Postgres Primary Key

This article comes with a complementary postgres extension which we wrote to benchmark various UUIDs: https://github.com/t3hmrman/pg_idkit

In case you don't read the article, my favourite idea is using the `ksuid` type as both an ID and a *created_at* field:

> One interesting feature would be using at least partially time-based UUIDs for created_at columns -- we could save space by virtualizing our created_at columns:

    CREATE TABLE users (
      id text PRIMARY KEY DEFAULT idkit_ksuid_generate(),
      name text,
    );

    SELECT *, idkit_ksuid_extract_timestamptz(id) 
    FROM users;