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List: boost-bugs
Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5215: regex_match is giving
From: "Boost C++ Libraries" <noreply () lists ! boost ! org>
Date: 2011-02-28 9:42:42
Message-ID: 066.b7a13344412b817b32c2fd09d5dd680f () lists ! boost ! org
[Download RAW message or body]
#5215: regex_match is giving a performance hit.
---------------------------------+------------------------------------------
Reporter: arjun_m@… | Owner: johnmaddock
Type: Bugs | Status: new
Milestone: To Be Determined | Component: regex
Version: Boost 1.46.0 | Severity: Optimization
Resolution: | Keywords:
---------------------------------+------------------------------------------
Comment (by anonymous):
Can you please provide some example code that illustrates the problem?
Please also bare in mind that matching a regular expression is in the
general case NP-complete. Assuming it doesn't change the semantics of
your program then something like:
{{{/Volumes/[^/]*/Backups.backupdb/.*}}}
Should be more efficient. Otherwise try something like:
{{{/Volumes(?:/[^/]*)+?/Backups.backupdb/.*}}}
--
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5215#comment:2>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.
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