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Python 3.14, due out later this yr, is ready to obtain a brand new sort of interpreter that may enhance efficiency by as much as 30% with no adjustments to present code.
The CPython 3.14 change log describes the feature as “a brand new sort of interpreter primarily based on tail calls.” This description could also be a bit of deceptive for many who don’t carefully observe inside Python improvement work. “Tail calls” doesn’t imply that CPython, or the Python language, will now assist tail call optimization. It refers to an optimization {that a} C compiler performs on the CPython code, which quickens the way in which the interpreter dispatches its bytecode directions.
No adjustments to present Python code are required, and C extension modules for CPython don’t should be recompiled both, as there aren’t any adjustments to the CPython APIs or ABIs. Nor does the brand new interpreter add important upkeep overhead to CPython, because it’s been applied primarily by repurposing present code.
