At my job, I’m refactoring a 30k LOC codebase that simulates learning in the mammal brain. The emergent behavior of these large brain models is hard to test for, so we opted to take the safe route and preserve bit-equality in the weights of the trained model to guarantee that we are not breaking anything.The main downside of hash-based regression testing during refactoring is that it doesn’t check numerical stability. The most common change we applied was inlining many small functions to ...
