Stream’s founder Vincent Hindriksen had to maintain a piece of software that was often failing to process the daily reports. After documenting the internals and algorithms of the code by interviewing the key people and some reverse engineering, it was a lot easier to create effective solutions for the bugs within the software. After fixing a handful of bugs, there was simply a lot less to do except reading books and playing online games. So why not rewrite the software in full? Three weeks it did not take 2.5 hours anymore to process the data, but 19 seconds. The kick for performance optimization was ignited.