For a very long time – since when multiple CPU cores were commonly available – I dreamed about MySQL having the ability to execute queries in parallel. This feature was lacking from MySQL, and I wrote a lots of posts on how to emulate parallel queries in MySQL using different methods: from simple parallel bash [&]

https://www.percona.com/blog/2019/01/23/mysql-8-0-14-a-road-to-parallel-query-execution-is-wide-open/