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It should be, as most interpreted code uses a JIT native compiler at this point, which implies the branch prediction is native as well.

I would be happy to stand corrected if someone knows more about this, though!

> most interpreted code uses a JIT native compiler at this point

I suspect most JavaScript code is JIT-compiled - but most Python, Ruby etc is interpreted (via bytecode).

AFAIK CPython doesn't JIT compile.

Recent versions of CPython do have an experimental JIT compiler. I'm not sure how widely-used it is, though.

It's disabled by default, not production ready. You need to compile CPython yourself if you want to try it.