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[Communication] .NET/C# collection List, HashSet to determine whether an element has a benchmark

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Posted on 2/24/2024 5:44:58 PM | | | |
Requirements: To maintain an old project, you need to process data in a loop, and you need to use the primary key to determine whether the elements exist in the collection, and then execute the corresponding logic. How big is the performance gap between using List and HashSet to determine whether there is a performance gap in an element?

Review:

.NET/C# uses BenchmarkDotNet to test code performance
https://www.itsvse.com/thread-9576-1-1.html

.NET/C# collection type query benchmark
https://www.itsvse.com/thread-10268-1-1.html
Test code:

The result is shown below:



N represents the amount of data in the collection, and the larger the number of collections, the worse the List lookup performance, but the HashSet has little impact.





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