Despite both implementations being nearly identical, why is Rust seemingly slower than Node when Rust is claimed to be three times slower than Node?

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It is very unlikely that Rust is actually slower than Node, as Rust is known for its high performance and speed. It is possible that the benchmark used to compare the two implementations was flawed or biased towards Node. Another possibility is that the Rust implementation was not optimized and written inefficiently, leading to slower performance. It is important to keep in mind that performance benchmarks can vary depending on the specific use case and system architecture, so it's best to consult multiple sources and conduct your own testing to ensure accurate comparisons.