While working on migrating support.mozilla.org away from
Kitsune (which is a great community
support platform that needs love, remember that internet) I needed to convert
about 4M database rows of a custom, Markdown inspired, format to HTML.
The challenge of the task is that it needs to happen as fast as possible so we
can dump the database, convert the data and load the database onto the new
platform with the minimum possible time between the first and the last step.
I started a fresh MySQL container and started hacking: