[Python-Dev] ast-objects branch created (original) (raw)

Jeremy Hylton jeremy at alum.mit.edu
Wed Dec 7 23:21:14 CET 2005

On 12/7/05, Delaney, Timothy (Tim) <tdelaney at avaya.com> wrote:

"Martin v. Löwis" wrote:

> Nick Coghlan wrote: >> As Fredrik pointed out a while back, the PyObject approach doesn't >> have to involve manual decref operations - PyObject's come with a >> ready made arena structure, in the form of PyList. > > That doesn't really work: PyListAppend (which you would have to use) > duplicates the reference, so you would still have to decref it > explicitly. Hmm - perhaps we should have a set of Arena functions/macros e.g. PyArenaAdd - works like PyListAppend, but doesn't duplicate the reference (or immediately decrefs it). I'm sure there are other parts of the code base that would benefit from this.

There is such a function on the ast-arena branch. The current implementation uses a linked list, so it consumes more memory than using a PyList.

Jeremy

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