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Asked: 2026-05-11T01:10:35+00:00

In C#, I’m marking some classes’ properties with attributes and I’m using reflection to

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In C#, I’m marking some classes’ properties with attributes and I’m using reflection to find these properties in order to perform gets and sets on them. I’ve found, however, that getting/setting with reflection in this manner is approximately 10x as slow as POCO gets/sets. Besides dropping the fundamental scenario described above to use alternate techniques, are there any documented tricks to make this significantly performant, such as caching techniques of some sort?

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  1. Going beyond what casperOne has said (including the bit about checking that this is the bottleneck), you may find it very helpful to convert the getters/setters into delegates (a Func<T> and an Action<T> for the getter and setter respectively) using Delegate.CreateDelegate. This can make a massive difference, and isn’t terribly hard. If you’re already going to cache the PropertyInfo, just cache the delegate pair instead.

    I’ve got a blog post about Delegate.CreateDelegate – I first used it in anger when porting Protocol Buffers (which can be reflection-heavy at times). It helped a lot in that case.

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