> Is it the case that early engineers would review and change resulting assembly? I'm a graybeard (~40 years as a dev) and I've never heard of people doing tha

> Is it the case that early engineers would review and change resulting assembly? I'm a graybeard (~40 years as a dev) and I've never heard of people doing that, at least not because of any wariness about compilers. That's not to say it didn't happen, of course, just that I never saw it. It did sometimes happen that something needed to be written in assembly for performance or space reasons, and devs would start with assembly generated by a compiler to save dev time, though. Not that often, but it happened.