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Full Discussion: sort takes a long time
Top Forums Shell Programming and Scripting sort takes a long time Post 302495003 by methyl on Wednesday 9th of February 2011 05:23:44 AM
Old 02-09-2011
I think we have found the problem.

UTF-8 is cited as the worst possible character set to sort or grep because it can't be sorted as a simple binary key.
If your data is actually US ASCII then I'd try the sort with with the locale set to "C".

On my system (yours has more values):
Code:
LANG=
LC_CTYPE="C"
LC_COLLATE="C"
LC_MONETARY="C"
LC_NUMERIC="C"
LC_TIME="C"
LC_MESSAGES="C"
LC_ALL=

If you must sort in UTF-8 order some recommend using the sort command in "perl". The "sort" command in "perl" is three times slower than unix "sort" for LANG=C , but ten times faster for LANG=en_US.UTF-8 .


Rant: The UTF-8 issue arises from the latest Posix standards. It has given me grief with mixed platform XML too.
 

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LOCALE.CONF(5)							    locale.conf 						    LOCALE.CONF(5)

NAME
locale.conf - Configuration file for locale settings SYNOPSIS
/etc/locale.conf DESCRIPTION
The /etc/locale.conf file configures system-wide locale settings. It is read at early-boot by systemd(1). The basic file format of locale.conf is a newline-separated list of environment-like shell-compatible variable assignments. It is possible to source the configuration from shell scripts, however, beyond mere variable assignments, no shell features are supported, allowing applications to read the file without implementing a shell compatible execution engine. Note that the kernel command line options locale.LANG=, locale.LANGUAGE=, locale.LC_CTYPE=, locale.LC_NUMERIC=, locale.LC_TIME=, locale.LC_COLLATE=, locale.LC_MONETARY=, locale.LC_MESSAGES=, locale.LC_PAPER=, locale.LC_NAME=, locale.LC_ADDRESS=, locale.LC_TELEPHONE=, locale.LC_MEASUREMENT=, locale.LC_IDENTIFICATION= may be used to override the locale settings at boot. The locale settings configured in /etc/locale.conf are system-wide and are inherited by every service or user, unless overridden or unset by individual programs or individual users. Depending on the operating system, other configuration files might be checked for locale configuration as well, however only as fallback. OPTIONS
The following locale settings may be set using /etc/locale.conf: LANG=, LANGUAGE=, LC_CTYPE=, LC_NUMERIC=, LC_TIME=, LC_COLLATE=, LC_MONETARY=, LC_MESSAGES=, LC_PAPER=, LC_NAME=, LC_ADDRESS=, LC_TELEPHONE=, LC_MEASUREMENT=, LC_IDENTIFICATION=. Note that LC_ALL may not be configured in this file. For details about the meaning and semantics of these settings, refer to locale(7). EXAMPLE
Example 1. German locale with English messages /etc/locale.conf: LANG=de_DE.UTF-8 LC_MESSAGES=en_US.UTF-8 SEE ALSO
systemd(1), locale(7), systemd-localed.service(8) systemd 208 LOCALE.CONF(5)
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