URL:
<http://savannah.gnu.org/bugs/?21001>
Summary: Grep is TOO slow in some locales.
Project: grep
Submitted by: None
Submitted on: Friday 09/07/2007 at 23:07 UTC
Category: None
Severity: 3 - Normal
Item Group: None
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
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Details:
Hi, this was already submitted as bug #14472, but i would like to
stress the severity of the problem. It takes 6s for grep to go through a 550K
text file in my machine when locale is set to en_US.UTF-8. When the locale is
set to C, the time is 0.007s.
Details below.
Thanks,
Apuã
[EMAIL PROTECTED]:~$ uname -a
Linux blimunda 2.6.22 #1 PREEMPT Sun Sep 2 12:24:33 BRT 2007 i686 GNU/Linux
[EMAIL PROTECTED]:~$ grep --version
GNU grep 2.5.3
Copyright (C) 1988, 1992-2002, 2004, 2005 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
[EMAIL PROTECTED]:~$ ls -la file.txt
-rw-r--r-- 1 apua apua 577571 2007-09-07 19:29 file.txt
[EMAIL PROTECTED]:~$ time LC_ALL=C grep 'sci' file.txt > /dev/null
real 0m0.007s
user 0m0.005s
sys 0m0.002s
[EMAIL PROTECTED]:~$ time LC_ALL=en_US.UTF-8 grep 'sci' file.txt > /dev/null
real 0m6.101s
user 0m5.147s
sys 0m0.065s
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