Rust Made One Function 100x Faster and the App Just 15%

FFI refactoring means rewriting a single hot function in Rust and importing it into your Python process via PyO3. One function got 100x faster, but the whole app only moved about 15 percent. The gap is where the real story lives.

$ 2026.10.06 · 4 min read · #rust

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Rust Made One Function 100x Faster and the App Just 15%

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