Den 12. jan. 2010 kl. 15.44 skrev Stefan Behnel <[email protected]>:
>
>> cdef Foo bar = Foo()
>> cdef inline Foo fastbar = bar
>>
>> bar.method() # through vtab
>> fastbar.method() # direct call
>
> Why would you want to control this from user code?
>
Because I feel the common usecase for skipping the vtab indirection is
calling a method repeatedly from user code.
This will not break Python semantics globally, but be a local
optimization when the user knows the type of an object. Yes, we can
already do this by declaring a const function pointer to the method;
but this approach is less messy, and requires less knowledge of C.
Another way of defining this could be by inheritance. For example:
cdef class FastFoo(Foo, cython.finalobject):
pass
cdef Foo bar = Foo()
cdef FastFoo fastbar = <FastFoo> bar
Sturla
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