which data types provide better performance

You use the proper data type for the proper job and thats the best performance you can hope for.

Value types typically operate on the stack and since they are primitive types they are "high performance". Reference types are complex types and operate on the heap, typically they are less fast than primitive types but after jit-ing they can be just as fast.

Pointer types are not used by C# unless you are working with unsafe code. The performance depends on what you are doing, they can either be very fast (near primitive) or very slow since the system has to do memory pinning and other unsafe operations.

Reflexive, which I think you mean reflected, are very slow, orders of magnitude slow actually because they cannot be precompiled during runtime.