I’ve just made the following experiment: edit f2, copy past the code of f1 into it. Same phenomenon happens.
Another experiment that I’ve made: Try the same scenarios from the julia repl directly (as opposed to vscode), as same phenomenon happens.
Yet another experiment: In scenario 3 first do the experiment of replacing f1 with f2 and then replace it with f1 again. It stays allocating. Facepalm.