&gt; - perl6 is the first mainstream(ish) dynamic language to not suffer from a GIL of some kind.<p>GILs are features of implementations, not languages; Ruby has implementations (most notably JRuby) without a GIL. And Clojure doesn&#x27;t have a GIL, and seems to be approaching mainstream.<p>And Perl 6 isn&#x27;t mainstream yet (it hopes to be, but then so do most languages.) And there&#x27;s plenty of not-currently-mainstream dynamic languages without GILs in their primary implementations; many in the Lisp&#x2F;Scheme family.