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Shaw: Python 3.13 gets a JIT
Tuesday January 9, 2024. 04:21 PM , from LWN.net
Anthony Shaw describes
the new copy-and-patch JIT that has been proposed for Python 3.13. Copy-and-patch was selected because the compilation from bytecodes to machine code is done as a set of “templates” that are then stitched together and patched at runtime with the correct values. This means that your average Python user isn’t running this complex JIT compiler architecture inside their Python runtime. Python writing it’s own IL and JIT would also be unreasonable since so many are available off-the-shelf like LLVMs and ryuJIT. But a full-JIT would require those being bundled with Python and all the added overheads. A copy-and-patch JIT only requires the LLVM JIT tools be installed on the machine where CPython is compiled from source, and for most people that means the machines of the CI that builds and packages CPython for python.org.
https://lwn.net/Articles/957239/
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