this post was submitted on 10 Jul 2025
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I gather that you don't actually use PyPy much. On average, I expect PyPy to deliver over a 3x speedup. The main issue is that people have built upon slow libraries like Numpy that only seem fast because CPython is even slower.
The reason that CPython cannot have a JIT added on is architectural and political. The CPython core team refuses to learn lessons from PyPy.