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Python 3.15 Release Candidate Brings Lazy Imports, New Profiler, and Immutable Dicts

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Python 3.15 is currently available as a release candidate, introducing several performance and usability improvements to the widely used programming language. A key feature is lazy imports, which defers module loading until actually needed, reducing application startup time without requiring changes to existing code. The release also includes Tachyon, a non-intrusive sampling profiler that monitors live applications at intervals to identify resource-heavy functions without needing restarts or code instrumentation. A new built-in frozendict type addresses a long-standing community request for an immutable dictionary, useful in scenarios requiring fixed key-value collections. Additionally, the JIT compiler continues to be refined, and select configurations now remove the Global Interpreter Lock to enable true multi-core parallel execution.

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Python 3.15 Release Candidate Brings Lazy Imports, New Profiler, and Immutable Dicts · ShortSingh