Steven Giesel • 2/17/2025

IEnumerable vs IEnumerator in C#: One is 2x Faster - LinkedIn Edition

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This article critically examines a popular LinkedIn post claiming one C# enumeration interface is 2x faster than the other. It presents the benchmark code, explains the fundamental difference between IEnumerable and IEnumerator, and then details three major flaws in the benchmark methodology that invalidate the performance claim, including the use of Debug.WriteLine and a tiny sample size.

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#performance #benchmarking #c
IEnumerable vs IEnumerator in C#: One is 2x Faster - LinkedIn Edition

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