I participated in the Rinha de backend (pt-BR) or “Backend Rooster Fight” in English challenge and I was super excited to see the results of my super hacky and performant solution.

The results were scheduled to be published at 21:00 BRT (2 AM CEST my local time). So I stayed up til later that night grabbed popcorn, and waited for the results.

Well, I wish I hadn’t waited…

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Picture this, you have a critical and reasonably complicated piece of logic in your application that is handled in the database. Despite any change on it (or around it), you must have a 100% guarantee that piece continues to work just fine. So, what do you do?

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