//devdigest: “⚡️ Allocation-Free foreach with Reflection.Emit Foreach loops over IEn…”

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Post #2579 66 Jan 20, 2026, 10:34 UTC

⚡️ Allocation-Free foreach with Reflection.Emit

Foreach loops over IEnumerable often hide allocations that hurt performance. This deep dive shows how to eliminate them using Reflection and DynamicMethod — crafting a truly allocation-free iteration path without giving up readability. A must-read for .NET performance purists.

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Andrew Lock | .NET Escapades Making foreach on an IEnumerable allocation-free using reflection and dynamic methods In this post I describe why foreach sometimes allocates, and show how you can use DynamicMethod and Reflection.Emit to go allocation-free

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