If you want IMMENSELY powerful logging, take a look at how the trace logging of Racket's Medic Debugger works, an absolutely ingenious solution: https://docs.

If you want IMMENSELY powerful logging, take a look at how the trace logging of Racket's Medic Debugger works, an absolutely ingenious solution: https://docs.racket-lang.org/medic/index.html https://docs.racket-lang.org/medic/index.html Highly interestingly, albeit a bit off topic, the authors of the paper from Medic originated very recently took this technique, and cranked it to 11: https://conf.researchr.org/event/sle-2017/sle-2017-papers-debugging-with-domain-specific-events https://conf.researchr.org/event/sle-2017/sle-2017-papers-de... …which won them a distinguished paper award!