Ruby has a GIL too, as far as I understand. Is the GIL in Ruby comparable to that in Python and present for similar reasons? If so, does that suggest that it's

Ruby has a GIL too, as far as I understand. Is the GIL in Ruby comparable to that in Python and present for similar reasons? If so, does that suggest that it's a genuine design constraint rather than a bad design decision? You don't say so explicitly, but your last sentence sounds like it's saying Python's GIL is due to bad design.