http://localhost:1313/tags/benchmarkdotnet/ Recent content in BenchmarkDotNet on Yunier's Wiki Hugo en Sat, 28 Aug 2021 00:00:00 +0000 http://localhost:1313/post/2021/the-order-of-interfaces-impacts-performance/ Sat, 28 Aug 2021 00:00:00 +0000 http://localhost:1313/post/2021/the-order-of-interfaces-impacts-performance/ <p>I was looking through some of my bookmarked Github issues when I rediscovered issue <a href="https://github.com/dotnet/runtime/pull/32488">#32488</a>, in that issue a <a href="https://github.com/dotnet/runtime/pull/32488#discussion_r380818002">comment</a> was made that caught my attention. The comment stated that in .NET the order of interfaces impacts performance. This is because in the <a href="https://docs.microsoft.com/en-us/dotnet/standard/clr">.NET CLR</a> all class definitions have a collection of methods and interface definitions. Casting is a linear search that walks the interface definition. If you are constantly casting to an Interface located at the end then the CLR must do a longer walk.</p>