> A lot of generated code is committed at FB that isn't at Google. This exacerbates the previous problem. FB has a ton of partially and completely generated files that mean a change to the generating code has a massive effect. At Google, for example, the protobuf generated code is genearted at build time and isn't in the repo.

What's nice about this scheme at Google is all manner of generated code is indexed, so you can navigate up and down the caller-callee graph between artisanal code and generated code. Really works well.