PERFORMANCE OF THE PYTHON 3.14 TAIL-CALL INTERPRETER

Summary from the TLDR Web Dev newsletter

Within the performance improvements of the Python 3.14 tail-call interpreter, a significant portion of the gains were due to a regression in LLVM 19 that inadvertently optimized the previous interpreter implementation. While the tail-call interpreter still offers a modest speedup, these gains show the challenges in benchmarking properly and how software dependencies are tough to deal with.