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Pyjion: who doesn’t want faster for free?


Speakers: Brett Cannon, Dino Viehland

At PyCon US 2015 an experiment was started: could a JIT be added to CPython which would speed up performance and be fully backwards-compatible? Could unaltered extension modules live happily with a JIT? That experiment is Pyjion and this talk will explain what we changed to CPython to add a pre-existing JIT to it and whether we met our goal of being a benefit instead of a hindrance.

Slides can be found at: and

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