[issue31377] remove *_INTERNED opcodes from marshal

[Benjamin Peterson]

Benjamin Peterson added the comment:

On Thu, Sep 7, 2017, at 09:46, INADA Naoki wrote:
> 
> INADA Naoki added the comment:
> 
> > We end up interning each reference individually currently.
> 
> But interning interned string is much faster. It only checks flag.
> Interning normal string requires dict lookup.

We could makes sure the version in the internal marshal memo is interned
if appropriate.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue31377>
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