Roger Upole <rup...@hotmail.com> added the comment: The culprit wrt copying Py_buffer structs seems mainly to be dup_buffer, which is called in memory_getbuf. This seems unnecessary in the case where there's an underlying object and it has returned the view thru its own tp_as_buffer. The underlying object at that point is solely responsible for releasing the buffer, so memory_getbuf shouldn't mess with it at all. In the case where there is no underlying object (mainly thru PyMemoryView_FromBuffer), it probably should allocate any memory in the view in such a way that it can be freed in memory_releasebuf when the view->obj is NULL.
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