Forward port benchmark for type checking

[mwichmann]

is_types.py had not been modernized. Remove any reference to the unicode builtin, which will never be present on Py3; stop using types.InstanceType which was only for old-style classes and never exists on Py3. It is now possible to:

$ python bench.py is_types.py

to get an up to date timing run of the type checking functions. Note it's probably a good idea to up the counts in bench.py, this completes pretty quickly.

This is internal-use stuff only, not part of the release or docs.

Here's a run with the repeat counts upped (Note: the checkInstanceType_is* functions no longer differ from the original_is* functions with the dropping of the InstanceType checks. Next round, we should just get rid of these).

Bench: is_types : is_types.py
Func01 (original_is_String):
       0.088 : String
       0.403 : List
       0.436 : Dict
       0.121 : UserString
       0.373 : UserList
       0.415 : UserDict
       0.360 : Object
Func02 (original_is_List):
       0.406 : String
       0.086 : List
       0.415 : Dict
       0.378 : UserString
       0.118 : UserList
       0.371 : UserDict
       0.375 : Object
Func03 (original_is_Dict):
       0.377 : String
       0.415 : List
       0.085 : Dict
       0.433 : UserString
       0.375 : UserList
       0.126 : UserDict
       0.372 : Object
Func04 (checkInstanceType_is_String):
       0.086 : String
       0.409 : List
       0.387 : Dict
       0.188 : UserString
       0.378 : UserList
       0.368 : UserDict
       0.358 : Object
Func05 (checkInstanceType_is_List):
       0.410 : String
       0.087 : List
       0.403 : Dict
       0.369 : UserString
       0.122 : UserList
       0.366 : UserDict
       0.384 : Object
Func06 (checkInstanceType_is_Dict):
       0.389 : String
       0.407 : List
       0.084 : Dict
       0.368 : UserString
       0.377 : UserList
       0.120 : UserDict
       0.416 : Object
Func07 (cache_type_e_is_String):
       0.053 : String
       0.348 : List
       0.340 : Dict
       0.080 : UserString
       0.341 : UserList
       0.357 : UserDict
       0.371 : Object
Func08 (cache_type_e_is_List):
       0.341 : String
       0.056 : List
       0.335 : Dict
       0.338 : UserString
       0.082 : UserList
       0.357 : UserDict
       0.333 : Object
Func09 (cache_type_e_is_Dict):
       0.394 : String
       0.340 : List
       0.086 : Dict
       0.386 : UserString
       0.338 : UserList
       0.080 : UserDict
       0.330 : Object
Func10 (global_cache_type_e_is_String):
       0.059 : String
       0.371 : List
       0.332 : Dict
       0.076 : UserString
       0.381 : UserList
       0.344 : UserDict
       0.388 : Object
Func11 (global_cache_type_e_is_List):
       0.389 : String
       0.061 : List
       0.326 : Dict
       0.337 : UserString
       0.077 : UserList
       0.334 : UserDict
       0.348 : Object
Func12 (global_cache_type_e_is_Dict):
       0.379 : String
       0.348 : List
       0.055 : Dict
       0.338 : UserString
       0.332 : UserList
       0.077 : UserDict
       0.330 : Object