I have been professionally programming Python now since I guess 2012 and its Pypy is an interesting one. Pypy seems to be in use overall in fairly specialized P

I have been professionally programming Python now since I guess 2012 and its Pypy is an interesting one. Pypy seems to be in use overall in fairly specialized Python application, like research code that is 'too big to rewrite', there are some legacy python applications I heard of successfully running on pypy for years, also you are able to get professional support in onboarding python programs on pypy. So pypy is often used in software that cannot continue to be operated on CPython for performance reasons and rewriting is not feasible / desirable. Fond memories: I did use pypy or a predecessor in like 2004 I think when I took part in a student computer science competition and my algorithm searching for subgraphs wasn't performing well enough to terminate in time.