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From: Peter Otten <__peter__@web.de>
Subject: Re: Memory usage steadily going up while pickling objects
Date: Sat, 15 Jun 2013 12:18:35 +0200
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References: <slrnkrn8ki.6mc.giorgos.tzampanakis@brilliance.eternal-september.org> <mailman.3352.1371261146.3114.python-list@python.org> <slrnkrodvp.6mc.giorgos.tzampanakis@brilliance.eternal-september.org>
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Xref: csiph.com comp.lang.python:48279

Giorgos Tzampanakis wrote:

> So it seems that the pickle module does keep some internal cache or
> something like that. 

I don't think there's a global cache. The Pickler/Unpickler has a per-
instance cache (the memo dict) that you can clear with the clear_memo() 
method, but that doesn't matter here.

> I don't want to resort to reading the pickle source
> code, but it seems I will have to...
 
I'd look somewhere else...