RustNL

When Iterators Aren't Zero Cost by Xavier Denis. Here’s something that surprises many new Rust developers: iterators can be *faster* than hand-written loops. The compiler sees the pattern, LLVM works its magic, and the result outperforms manual code. Now here’s something that surprises even experienced Rust developers: in certain cases, iterators make code 3-4x slower. We’re taught to believe that iterators are zero cost. But what happens when they aren't? On modern CPUs, performance comes from

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