Python 3.14, due out later this 12 months, is about to obtain a brand new sort of interpreter that may increase efficiency by as much as 30% with no adjustments to current code.
The CPython 3.14 change log describes the function as “a brand new sort of interpreter based mostly on tail calls.” This description could also be a bit of deceptive for many who don’t carefully comply with inside Python improvement work. “Tail calls” doesn’t imply that CPython, or the Python language, will now assist tail name 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 current Python code are required, and C extension modules for CPython don’t should be recompiled both, as there are not 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 current code.
