@gknauth racket -l errortrace -t myprog.rkt and you’ll have (a lot) more debugging information. This should go to the wiki. Ideally we should have one page with 1. debugging 2. profiling 3. optimizing for memory 4. optimizing for speed with all the relevant links to the docs (@spdegabrielle how does this sound?)

@plragde Yeah I’ve had similar issues in some of the latest nightlies. Are you using a recent one?

A debugging page is a good idea

Both how to turn it on and off

https://techcommunity.microsoft.com/t5/excel-blog/announcing-lambda-turn-excel-formulas-into-custom-functions/ba-p/1925546\|https://techcommunity.microsoft.com/t5/excel-blog/announcing-lambda-turn-excel-formulas-into-custom-functions/ba-p/1925546

Do any other spreadsheets have this functionality?

@laurent.orseau I’m still on 7.8 (I tend not to change horses in the middle of a teaching term).

Hm, I don’t think I saw that kind of problem on 7.8, sorry

I can upgrade in a few days, let me see if the behaviour persists.

They probably will soon ¯_(ツ)_/¯

Of possible interest to hardware and Apple enthusiasts: https://www.theregister.com/2020/12/07/apple_apple_apple_wip/ & https://debugger.medium.com/why-is-apples-m1-chip-so-fast-3262b158cba2