[Python-Dev] Using PEP384 Stable ABI for the lzma extension module

[Antoine Pitrou]

Le mercredi 05 octobre 2011 à 18:12 +0200, "Martin v. Löwis" a écrit :
> >> Not sure what you are using it for. If you need to extend the buffer
> >> in case it is too small, there is absolutely no way this could work
> >> without copies in the general case because of how computers use
> >> address space. Even _PyBytes_Resize will copy the data.
> >
> > That's not a given. Depending on the memory allocator, a copy can be
> > avoided. That's why the "str += str" hack is much more efficient under
> > Linux than Windows, AFAIK.
> 
> Even Linux will have to copy a block on realloc in certain cases, no?

Probably so. How often is totally unknown to me :)

Regards

Antoine.