Python 3.13 Sees Last Minute Delay Due To Performance Regression

Python 3.13 had been scheduled for release today with a new interactive interpreter, experimental free-threaded build mode to disable the Global Interpreter Lock (GIL), an experimental JIT, and other shiny new features. But a performance regression has delayed the Python 3.13 release to next week and in turn an unexpected Python 3.13-rc3 final test release...