Summary: developers were calling a method over and over 30 levels deep inside the stack and just barely not going over the 2k golang stack size initial limit. i

Summary: developers were calling a method over and over 30 levels deep inside the stack and just barely not going over the 2k golang stack size initial limit. i.e. they were getting great performace because everything happened to be 1.9k or 1.8k, or just not quite 2k or more. Then, a change, and performance went terrible. On the opposite side of 2k with 2.1k or 2.2k an entire extra 2K more had to be allocated for a total of 4k to fit everything. Engineers stop at nothing to find the RCA looking at assembly of the binary and yes, forking the go compiler.