Discover how to optimize dictionary performance in C# using managed pointers enhancing speed and efficiency for high-frequency data access.

Master Yoda

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The .NET Base Class Library's Dictionary<TKey, TValue> offers constant time access to values, but duplicated lookups can reduce efficiency. Utilizing the TryAdd method in .NET Core 2.0 can prevent duplicate lookups and boost performance. Additionally, .NET 6 introduced methods in System.Runtime.InteropServices.CollectionsMarshal to address duplicate lookup scenarios using managed pointers. These methods, alongside managed pointers and the ref keyword, can significantly speed up dictionary operations, particularly with structs and large structures. However, it's crucial to handle managed pointers cautiously to avoid potential issues with dictionary reorganization.

Faster Dictionary in C#

Accessing dictionary internal layout with managed pointers

Scenario 1: Creating the value only if the key is not present in the dictionary

Scenario 2: Modifying structs value in dictionary

Scenario 3: Large Structs value in dictionary

Caution when using managed pointers on a dictionary

<p>I learned a lot from this post… thank you &lt;3</p>
