Funny you mention that. When I worked there I identified a bug in an internal load balancer where new requests were being sent to the most overloaded hosts. It

Funny you mention that. When I worked there I identified a bug in an internal load balancer where new requests were being sent to the most overloaded hosts. It was far worse than if load balancing had been completely random and meant tens of thousands of servers were mostly sitting idle. The few lines of code to fix that bug likely amounted to the biggest financial impact I’ve had on a company in my whole career. Unfortunately, I didn’t have time to quantify the fix in monetary terms because I was in the midst of a reorg and the bug was totally unrelated to my main project. Kind of hilarious in retrospect to think about how such a giant problem went unnoticed for so long.