If you are calling SomeType.SomeMethod(a, b, c) then you don't know what combintions of a, b, c could allocate unless you can peek into it or try every combinat

If you are calling SomeType.SomeMethod(a, b, c) then you don't know what combintions of a, b, c could allocate unless you can peek into it or try every combination of a, b and c. So it's hard to know in the general case even with profiling and testing.