What are the major new features in Python 3.15 alpha 2?

UTF-8 default encoding (PEP 686), new statistical profiler (PEP 799), PyBytesWriter C API (PEP 782), and better error messages.

When is the final Python 3.15 release?

Release candidate by July 28, 2026; stable likely Q4 2026 if schedule holds.

Should I use Python 3.15 alpha for production?

No—explicitly not recommended. Test features, report bugs.

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Python 3.15 Alpha 2 Hits: UTF-8 Default Locks In, Profiler Promises Speed Gains

Python 3.15.0 alpha 2 dropped today, cementing UTF-8 as the default encoding after years of debate. But does a fancy new profiler justify jumping into alphas this early?

theAIcatchup Apr 07, 2026 3 min read

Python 3.15.0 alpha 2 announcement with key feature icons like UTF-8 and profiler

⚡ Key Takeaways

UTF-8 default eliminates cross-platform encoding headaches for good. 𝕏
New low-overhead profiler targets perf bottlenecks without slowdowns. 𝕏
Alpha 2 signals Python's push to match faster rivals like Go in efficiency. 𝕏

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#Python 3.15 #Python profiler #UTF-8 default #alpha release #profiler PEP 799 #sampling profiler

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Originally reported by Python Insider

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