Python 3.15 makes lazy imports opt-in and UTF-8 the default

Python 3.15 is now stable, bringing opt-in lazy imports that can defer module loading until code needs it, while making UTF-8 the default for text files opened without an explicit encoding. The release also reports faster experimental JIT performance, but gains vary by platform and comparison baseline. New profiling and runtime features give developers more ways to inspect and tune Python applications. Source

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