Just for fun I ran a BenchmarkDotNet comparison between .NET Framework 4.8 and .NET 7 for some reflection related functionality like invoking a method or getting a private field etc.
Click on the image for a larger view in a new window …

Reflection is slow so it’s great to see how much it has improved since .NET Framework 4.8.
GitHub Gist code to re-create
.NET Framework 4.8 v .NET 7 Reflection Benchmarks (github.com)