Message 202273 - Python tracker

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In-reply-to
Author	vstinner
Recipients	vstinner
Date	2013年11月06日.17:05:05
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1383757505.5.0.780170182234.issue19512@psf.upfronthosting.co.za>

Content
In interactive mode, when I run python in gdb, I see that PyUnicode_DecodeUTF8Stateful() is called a lot of times. Calls come from PyDict_GetItemString() or PySys_GetObject() for example. Allocating a temporary Unicode string and decode a byte string from UTF-8 is inefficient: the memory allocator is stressed and the byte string is decoded at each call. I propose to reuse the _Py_IDENTIFIER API in most common places to limit calls to the memory allocator and to PyUnicode_DecodeUTF8Stateful().

Content

In interactive mode, when I run python in gdb, I see that PyUnicode_DecodeUTF8Stateful() is called a lot of times. Calls come from PyDict_GetItemString() or PySys_GetObject() for example.
Allocating a temporary Unicode string and decode a byte string from UTF-8 is inefficient: the memory allocator is stressed and the byte string is decoded at each call.
I propose to reuse the _Py_IDENTIFIER API in most common places to limit calls to the memory allocator and to PyUnicode_DecodeUTF8Stateful().

History
Date	User	Action	Args
2013年11月06日 17:05:05	vstinner	set	recipients: + vstinner
2013年11月06日 17:05:05	vstinner	set	messageid: <1383757505.5.0.780170182234.issue19512@psf.upfronthosting.co.za>
2013年11月06日 17:05:05	vstinner	link	issue19512 messages
2013年11月06日 17:05:05	vstinner	create

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