PyO3: From Python to Rust and Back Again (with David Hewitt)
Developer Voices
Optimizing Performance in PyO3 Binding Layer
PyO3 aims to match the performance of C and C++ by optimizing overheads and safety checks to achieve zero-cost abstractions. Although there might be slight sacrifices in performance at the boundary between Python and Rust code, once inside the Rust code, the performance is highly optimized. Recent optimizations in PyO3 have made it more competitive with pure Python functions, ensuring that the sacrifice at the boundary provides significant power and control in the Rust code. The design choice emphasizes sacrificing a bit for higher performance later, especially beneficial for tasks requiring speed, like fast loops, in Rust compared to Python.
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