Software1 hOctober 16, 2026, 16:00

Python 3.15 released with JIT, lazy imports, and frozendict

Python 3.15 is now generally available. The release brings improved JIT compilation with up to 20% speedups, lazy imports, more detailed error messages, a new immutable frozendict type, and all-new profiling capabilities.

InfoWorld

Open source

JIT compilation speeds up code by up to 20% with no code changes
Lazy imports defer startup delays
New frozendict type allows using a dict as a key
More detailed errors and new profiling tools

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Python 3.15: test shows lazy import defers the delay, not removes it

Software

Python 3.15 lazy imports cut cold start from 512 ms to 32 ms

Software

Python 3.15 released with default UTF-8 support on all platforms

Software

Python 3.15 released with JIT, lazy imports, and frozendict

Python 3.15: test shows lazy import defers the delay, not removes it

Python 3.15 lazy imports cut cold start from 512 ms to 32 ms

Python 3.15 released with default UTF-8 support on all platforms

Open source roundup: Python 3.15, OpenSSH 10.6 and LineageOS 24.0