[issue19219] speed up marshal.loads()

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

> I don't understand how _PyUnicode_UTF8() can be used for *unmarshalling*.

I say about marshalling.

> That said, I'll try out the patch with _PyUnicode_FromUCS1 instead of _PyUnicode_FromASCII, to see if it affects performance.

Could you try out the patch with PyUnicode_DecodeUTF8()? This will save you two opcodes and perhaps several lines of code.

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<http://bugs.python.org/issue19219>
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