question: calling .toSet() on a mutableSet like `s...

# announcements

[Fuyang]

question: calling .toSet() on a mutableSet like someMutableSet.toSet() seems to be a very time consuming operation?

I am doing some naive bayes model on the 20newsgroup data and return someMutableSet.toSet() will making prediction on test data takes more than 10 minutes while return someMutableSet will finish in 10 seconds…?🤔 And there is no updates on this returned set downstreams, only using it to get size or get some intersect…

It’s a bit counterintuitive 🤨