Empirical study of LLM-assisted stdlib-only reimplementations finds performance parity within 2x in most cases, with C-extensions as the main bottleneck and occasional 5-115x speedups from avoiding third-party overhead.
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Stdlib or Third-Party? Empirical Performance and Correctness of LLM-Assisted Zero-Dependency Python Libraries
Empirical study of LLM-assisted stdlib-only reimplementations finds performance parity within 2x in most cases, with C-extensions as the main bottleneck and occasional 5-115x speedups from avoiding third-party overhead.