[Python-Dev] Linus on garbage collection
Michael Foord
fuzzyman at voidspace.org.uk
Fri May 6 18:31:44 CEST 2011
On 06/05/2011 17:18, skip at pobox.com wrote:
> Antoine> Since we're sharing links, here's Matt Mackall's take:
> Antoine> http://www.selenic.com/pipermail/mercurial-devel/2011-May/031055.html
>
> > From that note:
>
> 1: You can't have meaningful destructors, because when destruction
> happens is undefined. And going-out-of-scope destructors are extremely
> useful. Python is already a rather broken in this regard, so feel free
> to ignore this point.
>
> Given the presence of cyclic data I don't see how reference counting or
> garbage collection win. Ignoring the fact that in a pure reference counted
> system you won't even consider cycles for reclmation, would both RC and GC
> have to punt because they can't tell which object's destructor to call
> first?
pypy and .NET choose to arbitrarily break cycles rather than leave
objects unfinalised and memory unreclaimed. Not sure what Java does.
All the best,
Michael Foord
> Skip
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