What's Slow and What's Not with .NET 2.0 Reflection API?

For quick reference, keep in mind that :

Fast and Light Functions

typeof 

Object.GetType 

typeof == Object.GetType 

Type equivalence APIs (including typehandle operator overloads) 

get_Module 

get_MemberType 

Some of the IsXX predicate APIs 

New token/handle resolution APIs in the .NET Framework 2.0 

Costly Functions

GetXX APIs (MethodInfo, PropertyInfo, FieldInfo, and so on) 

GetCustomAttributes 

Type.InvokeMember 

Invoke APIs (MethodInfo.Invoke, FieldInfo.GetValue, and so on) 

get_Name (Name property) 

Activator.CreateInstance

Give a look at http://msdn.microsoft.com/en-us/magazine/cc163759.aspx

to have much more details on :

- When to use reflection,

- Early-Bound, Hybrid-bound and Late-Bound Invocation,

-  the MemberInfo cache, 

...