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SQLAlchemy seems to run quite a bit slower (2-3x) under PyPy. I've gathered some pstats profiles comparing the two. PyPy (latest nightly build) + SQLAlchemy (master ...

"description": "Antonio Cuni - Python and PyPy performance (not) for dummies\n[EuroPython 2015]\n[21 July 2015]\n[Bilbao, Euskadi, Spain]\n\nIn this talk we would like to have a short introduction on ...

Abstract: The use of Python as a high level productivity language on top of high performance libraries written in C++ requires efficient, highly functional, and easy-to-use cross-language bindings.