Probably more accurately Python--; it cuts out a lot of features from Python, a great deal of which you weren't using, some others of which there are other ways to do, and ends up with a simpler and also much faster language, in which you will sometimes miss a Python feature, but in my experience not as often as you might think. But definitely non-zero.
(By "not using", I mean for instance that in Python, like Javascript, at any moment, you may set a new method on a particular instance, and the Python runtime must deal with that, such as by spending a lot of time looking up references that never actually change in a real program. This is a really expensive feature that you are paying for all the time, yet rarely using. A great deal of the JIT speedup you can get in such languages is working out how to skip those lookups optimistically until someone actually changes them.)