GNU bug report logs - #17070
[PATCH] grep: optimization of DFA by reuse of multi-byte buffers in non-UTF8 locales

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Package: grep;

Reported by: Norihiro Tanaka <noritnk <at> kcn.ne.jp>

Date: Sun, 23 Mar 2014 13:20:03 UTC

Severity: normal

Tags: patch

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Norihiro Tanaka <noritnk <at> kcn.ne.jp>
To: submit <at> debbugs.gnu.org
Subject: [PATCH] grep: optimization of DFA by reuse of multi-byte buffers in
 non-UTF8 locales
Date: Sun, 23 Mar 2014 22:19:36 +0900

[Message part 1 (text/plain, inline)]
Package: grep
Tags: patch

dfaexec() allocates and deallocates many buffers in non-UTF8 locales, but
it's very inefficient.

If put them on struct dfa and reuse them, when use not regex but DFA for
ANYCHAR, it will speed up about 20-30% in non-UTF8 locales.

Norihiro

[patch.txt (text/plain, attachment)]
This bug report was last modified 11 years and 100 days ago.

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