This is a list of various non-type-specific operations that have custom native implementations. If an operation has no native implementation, mypyc will use fallback generic implementations that are often not as fast.

• x is y (this is very fast for all types)

• isinstance(obj, type: type)
• isinstance(obj, type: tuple)
• cast(<type>, obj)
• type(obj)
• len(obj)
• id(obj)
• iter(obj)
• next(iter: Iterator)
• hash(obj)
• getattr(obj, attr)
• getattr(obj, attr, default)
• setattr(obj, attr, value)
• hasattr(obj, attr)
• delattr(obj, name)
• slice(start, stop, step)
• globals()

• @property
• @staticmethod
• @classmethod
• @abc.abstractmethod

These variants of statements have custom implementations:

• for ... in seq: (for loop over a sequence)
• for ... in enumerate(...):
• for ... in zip(...):