Python 3.13 Release Notes 2025 Link

A built‑in python -m monitor tool shows live bytecode, JIT stats, and per‑line execution counts – no third‑party profiler needed for basic tuning.

Python 3.13 is designed to be mostly backwards compatible with Python 3.12. However, as with any new release, there may be some changes that affect existing code. We encourage you to review the Porting to Python 3.13 guide to ensure a smooth transition. python 3.13 release notes 2025

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Following 3.11’s tradition, 3.13 now suggests fixes for: A built‑in python -m monitor tool shows live