What is python-dateutil-rs?

Drop-in Rust replacement for python-dateutil—same API, 5-94x faster parsing, rrules, timezones via one import swap.

Does python-dateutil-rs work with Pandas?

Yes, since dateutil powers Pandas datetime; swap import, gains flow through—no code changes.

Is python-dateutil-rs production-ready?

Tests pass 100% against original suite; naive port but validated module-by-module. Use caching for max wins. Word count: ~950.

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Rust's python-dateutil Clone Just Made My Date Parsing 94x Faster—No Code Tweaks Needed

Pip install python-dateutil-rs. Swap one import. Watch your date parsing scream—up to 94x faster. But is this Rust takeover for real, or just low-hanging fruit?

theAIcatchup Apr 08, 2026 3 min read

Benchmark graph: python-dateutil vs dateutil-rs speedups up to 94x on M3 Mac

⚡ Key Takeaways

Swap one import for 5x-94x speedups in date parsing, rrules, timezones—no app changes. 𝕏
Naive line-by-line Rust port via PyO3 proves Python perf gaps; full opts could 10x more. 𝕏
Echoes Polars/NumPy shift—expect more _rs libs eating Python's hot paths by 2026. 𝕏

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theAIcatchup

Community-driven. Code-first.

#date parsing #performance optimization #pyo3 #python-dateutil-rs #python-performance #rust #rust python

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Originally reported by Dev.to

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