# Pre-PEP: Rust for CPython

**URL:** <https://discuss.python.org/t/pre-pep-rust-for-cpython/104906>\
**Category:** Core Development\
**Created:** [November 17, 2025, 4:14pm UTC](https://discuss.python.org/t/pre-pep-rust-for-cpython/104906 "2025-11-17T16:14:10Z")\
**Posts on this page:** 1\
**Showing post:** 18

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**Author:** ![jamestwebber](https://sea2.discourse-cdn.com/flex002/user_avatar/discuss.python.org/jamestwebber/32/12799_2.png) [@jamestwebber](https://discuss.python.org/u/jamestwebber)\
**Post date:** [November 17, 2025, 7:55pm UTC](https://discuss.python.org/t/pre-pep-rust-for-cpython/104906/18 "2025-11-17T19:55:18Z")

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In my experience incremental Rust builds are also very fast–the initial setup (including downloading and building all the dependencies) can be slow, but it’s able to do fast incremental builds just fine.

Also, there’s a big difference between debug and release mode–building in debug mode is way faster. I would be surprised if this impacted iteration time unless you’re trying to rebuild the world every time.

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