[Patches] [ python-Patches-573977 ] Speed-up shlex

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Patches item #573977, was opened at 2002-06-26 02:23
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Category: Library (Lib)
Group: Python 2.3
Status: Open
>Resolution: Postponed
Priority: 5
Submitted By: Raymond Hettinger (rhettinger)
>Assigned to: Raymond Hettinger (rhettinger)
Summary: Speed-up shlex

Initial Comment:
Shlex spends a lot of its time testing whether a 
character is a commenter, wordchar, whitespace, or 
quote.  It currently tests for membership in a string, O
(n).  Tests for membership in a dictionary are much 
faster, O(1).  Even with a single member, 
__contains__ works faster on a dictionary than a 
string.


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>Comment By: Raymond Hettinger (rhettinger)
Date: 2002-06-28 18:06

Message:
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Post-poned pending GvR review of the dict(seqn, value) 
patch.

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Comment By: Raymond Hettinger (rhettinger)
Date: 2002-06-26 10:30

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Here is a tiny patch for your review.


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https://sourceforge.net/tracker/?func=detail&atid=305470&aid=573977&group_id=5470