> If I recall correctly, there are macros to control the level of code optimization?

Yup, you can either `(proclaim (optimize (debug 3) (speed 1)))` somewhere, which will take effect globally, or you can `(declare (optimize ...))` inside a particular function. It sounds great in theory - and it is great, in some respects - but this granularity makes it harder to ensure all interesting code is steppable when you need it.