How (in)efficient is a list comprehension if you don't assign it?

Question

In this question, I\'m having an argument with a commenter who argues that

for t in threads:
    t.join()

would be better than

Answer 1

If you want a one-liner why not just do for t in threads: t.join()?

Seems like the simplest solution to me, and likely to be the fastest too (though really, the overhead of joining threads is likely to dwarf anything else IMO)