[XML-SIG] XML code that creates cyclic garbage
Uche Ogbuji
uogbuji@fourthought.com
Fri, 30 Jun 2000 10:04:53 -0600
> On Fri, Jun 30, 2000 at 11:37:28AM -0400, Jeremy Hylton wrote:
> >garbage collection scheme can not collect. Can someone point me at
> >some example code that has this property? I'd like to test the
> >garbage collector that is in Python 2.0.
>
> I believe 4DOM uses cyclical references, and requires that you always
> call a .releaseNode() method to break the cycles. So, you could just
> try running 4DOM and never calling .releaseNode(); with the GC, it
> shouldn't leak. The old PyDOM code tried to avoid creating cycles, so
> it wouldn't make any garbage to be collected (modulo bugs).
Yes. You can simply take any of the 4DOM demos, replace the ReleaseNode calls
with a del of the corresponding root node, and check that all memory was
reclaimed.
--
Uche Ogbuji Principal Consultant
uche.ogbuji@fourthought.com +01 303 583 9900 x 101
Fourthought, Inc. http://Fourthought.com
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