Python 3.15 Released With Experimental JIT Compiler Running Faster

Python 3.15 is out today as the newest annual feature release for the Python programming language. Python's JIT compiler is still in experimental form but it's a lot faster now with Python 3.15. The JIT compiler should be 7~8% geo mean faster on Linux x86-64 over Python's standard interpreter. On AArch64 macOS the JIT compiler is said to be 11~12% faster over the tail-calling interpreter. Python 3.15 also introduces the sentinel built-in type, UTF-8 is the default encoding of Python 3.15, explicit lazy imports for faster Python script startup times, a new "frozendict" built-in type, and package startup configuration files. Python 3.15 also benefits from improved error messages, standard library enhancements, C API improvements. Python 3.15 also enables frame pointers by default for improved system-level observability. Downloads and more details on today's Python 3.15 release at Python.org.