Software1 hOctober 24, 2026, 19:00

Python 3.15 ships a new profiler

Python 3.15 adds a new profiler that catches performance issues missed by the standard cProfile. Towards Data Science details how the tool works and where it differs from cProfile.

Towards Data Science

Open source

Python 3.15 includes a new built-in profiler
The tool finds bottlenecks that cProfile misses

#Python

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Python 3.15 lazy imports cut CLI startup from 164 ms to 28 ms

Software

Python 3.15 adds explicit lazy imports with the lazy keyword

Software

Python 3.15 speeds up Base32 135x but slows Base16 by 22%

Software

Python 3.15 ships a new profiler

Python 3.15 lazy imports cut CLI startup from 164 ms to 28 ms

Python 3.15 adds explicit lazy imports with the lazy keyword

Python 3.15 speeds up Base32 135x but slows Base16 by 22%

Python 3.15 released with JIT, lazy imports, and frozendict