GNU bug report logs - #17203
[PATCH] grep: speed-up of DFA by checking multibyte characters on demand

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Package: grep;

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

Date: Sun, 6 Apr 2014 09:54:02 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: bug-grep <at> gnu.org
Subject: [PATCH] grep: speed-up of DFA by checking multibyte characters on
 demand
Date: Sun, 06 Apr 2014 18:52:17 +0900

[Message part 1 (text/plain, inline)]
If dfaexec() runs in non-UTF8 locales, length and wide character
representation are checked for all characters of a line in a input
string.  However, if matched early in the line, results for remaining
characters are wasted.

This patch checks multibyte characters on demand.  It enables to
accomplish to speed-up for matched early and reduce required memories.

Norihiro

[patch.txt (text/plain, attachment)]
This bug report was last modified 11 years and 95 days ago.

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