[issue20879] base64 module of Python 3.4 uses 920 kB of memory

[STINNER Victor]

STINNER Victor added the comment:

Serhiy wrote on Rietveld:
"As far as this constant is repeated twice, it wastes memory and errorprone."

Oh, I expected marshal to be smart and use references, but it does not.

Here is a simpler patch which initialize all base85 tables at once using a "b85alphabet" variable which simplify also the initialization of the decoder table.

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Added file: http://bugs.python.org/file34421/base64_urlparse_lazy_init-3.patch

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