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Title: Optimize CI cache usage by fanninpm · Pull Request #6707 · RustPython/RustPython · GitHub

Open Graph Title: Optimize CI cache usage by fanninpm · Pull Request #6707 · RustPython/RustPython

X Title: Optimize CI cache usage by fanninpm · Pull Request #6707 · RustPython/RustPython

Description: When I was working on #6410, I noticed that the CI job "snippets_cpython" was recompiling RustPython even though no Rust code was changed. I assumed the reason for the recompilation was because the "Check whats_left is not broken" step is recompiling RustPython with different cargo features than were defined earlier in the same job. This "whats_left" recompilation is what ultimately gets cached/restored by the rust-cache action. Then, when the "build rustpython" step is run, the difference in Cargo features necessitates a recompilation before the snippets and CPython tests are run. For each CI run in the "snippets_cpython" job, these two recompilations cost us about 4 minutes on the Ubuntu runner, about 5 minutes on the macOS runner, and about 7-8 minutes on the windows runner. This PR aims to eliminate the useless recompilations, making the CI run a little bit faster. Summary by CodeRabbit Chores Updated CI workflow to use OS-specific build configurations, ensuring proper feature compilation across different platforms. ✏️ Tip: You can customize this high-level summary in your review settings.

Open Graph Description: When I was working on #6410, I noticed that the CI job "snippets_cpython" was recompiling RustPython even though no Rust code was changed. I assumed the reason for the recompilation was b...

X Description: When I was working on #6410, I noticed that the CI job "snippets_cpython" was recompiling RustPython even though no Rust code was changed. I assumed the reason for the recompilati...

Opengraph URL: https://github.com/RustPython/RustPython/pull/6707

X: @github

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dac40a0 Make whats_left.py compile with same settings as before fanninpm Jan 11, 2026 https://patch-diff.githubusercontent.com/RustPython/RustPython/pull/6707/commits/dac40a071a5c6be2e5495a26f2752a0871ddbb7e
c930055 Add --no-default-features to scripts/whats_left.py fanninpm Jan 20, 2026 https://patch-diff.githubusercontent.com/RustPython/RustPython/pull/6707/commits/c930055614e03d6b1c592e9e5f5272c9c9e0b27e
7b54963 Build RustPython with no default features fanninpm Jan 20, 2026 https://patch-diff.githubusercontent.com/RustPython/RustPython/pull/6707/commits/7b54963437c98af25dbf4efced64b19ae564d927
2c9c72d Retrigger CI fanninpm Jan 20, 2026 https://patch-diff.githubusercontent.com/RustPython/RustPython/pull/6707/commits/2c9c72d584cafa5613b6ed58e32c1f7fb2561236
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