Worked on the pola-rs/pyo3 repository to optimize performance and safety for Python-Rust interoperability, focusing on extension-method wrappers. Developed a benchmarking tool to measure method-call overhead and introduced a low-overhead fast path to reduce latency in high-frequency code paths. Enhanced safety by implementing trusted self-conversion at the C level and specialized descriptor-slot handling, ensuring robust extension-type method calls without sacrificing performance. Expanded the test suite to validate these improvements and updated documentation for changelog visibility. Utilized Rust and Python C Extensions, applying performance benchmarking and rigorous testing to deliver measurable throughput gains and improved reliability for PyO3-based production workloads.