Yeah I know I can use them for those. But I would rather if I could mark one solution as it has good performance and is readable and some other with clever as it is nice one-liner than to have to mark both with clever/best practices and have no option other than comments to differentiate between those two.

I think performance is important feature enough to have its own label.

Hello there, nice site, even though the slowness of it is sometimes frustrating.

I have a suggestion about labeling solutions of a particular kata. To this day user can label each solution with 'Best practice' and/or 'Clever'. I think it would be nice if there would be more:

Something like 'Most readable' or 'Nice to read' (that doesn't always has to mean best practice).

Something like 'Good/bad performance'.

I found it often that there are solutions on top of ratings that are both not so easy to read and have a bad performance. And people have to write these in the comments.
As this should serve as a learning platform it would be nice if also solutions that are easier to read and therefore easier to maintain, perform better and are less error prone had some more praise here.

Isn't it possible that the execution would end with StackOverflowError for really large Linked list? Because of the recursion? Just to make myself sure...