Overview
CPython’s new JIT (Just-In-Time) compiler has exceeded performance expectations, delivering measurable speed improvements ahead of schedule. Python is getting significantly faster with 11-12% improvements on macOS and 5-6% on Linux in the upcoming 3.15 release.
Key Facts
- Hit performance goals over a year early for macOS AArch64 - Python development is accelerating faster than expected
- 11-12% faster on macOS AArch64 compared to tail calling interpreter - noticeable performance gains for Mac developers
- 5-6% faster on x86_64 Linux compared to standard interpreter - meaningful speedups for most production environments
- JIT compiler included in Python 3.15 alpha - performance improvements coming to mainstream Python soon
Why It Matters
This represents a major milestone for Python performance. Python is breaking free from its reputation as a slow language, potentially making it more competitive with faster languages for performance-critical applications and reducing the need for developers to switch to other languages for speed.