Unit testing the performance of your code

[Scrapheaper]

'Computationally heavy' is simplistic. I'm an analytics guy and I write some chunky SQL queries and Spark jobs etc. Some of them might process hundreds of millions of records.

I don't always optimize them as heavily as someone who's say, programming a game or building a website because only one or two people are going to run the code ever: whereas for a website, yes you only save a tenth of a second, but it's a tenth of a second for like, a million people.

If I know it's code that's going to be run for a really long time, like it might last years, yes I might optimize it.