This thread, as far as I understand, makes it clear that code-golf questions are generally off topic. But regarding the top answer, I got the impression that if a question asks to do a specific task and reward the answers based on their code length, then it would be off topic and maybe belongs to somewhere else.
But suppose that I wrote a piece of Mathematica code and want to improve it, and my improvement criteria is heavily biased towards the code length. In other words, performance is not a concern, nor its readability or simplicity. Quoting a part of @Verbeia's answer in the linked thread:
I think code review questions should only be allowed where the asker has been specific about how they are looking to improve the code, e.g. faster, more functional style, more concise/readable.
Now what about the code length? Is asking how to golf a code on topic?