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Top Forums UNIX for Advanced & Expert Users Recursive directory search using ls instead of find Post 302537503 by bearvarine on Friday 8th of July 2011 11:24:56 AM
Old 07-08-2011
@Corona688: You make very good points here, and I believe you are essentially affirming my main point - don't put lots of little programs together in tight loops and expect good performance from a shell script.

Honestly though, -- and I know this is just my personal opinion -- I think awk is a scourge upon our land. Like kudzu, it should be ripped out where ever it is found and replaced with something less inscrutable. I don't think there is any reason in 2011 to continue using an such an ancient, arcane, difficult to debug tool like awk when there are so many better choices available. - I'm Just Sayin'... Smilie
 

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English(3pm)						 Perl Programmers Reference Guide					      English(3pm)

NAME
English - use nice English (or awk) names for ugly punctuation variables SYNOPSIS
use English; use English qw( -no_match_vars ) ; # Avoids regex performance penalty # in perl 5.16 and earlier ... if ($ERRNO =~ /denied/) { ... } DESCRIPTION
This module provides aliases for the built-in variables whose names no one seems to like to read. Variables with side-effects which get triggered just by accessing them (like $0) will still be affected. For those variables that have an awk version, both long and short English alternatives are provided. For example, the $/ variable can be referred to either $RS or $INPUT_RECORD_SEPARATOR if you are using the English module. See perlvar for a complete list of these. PERFORMANCE
NOTE: This was fixed in perl 5.20. Mentioning these three variables no longer makes a speed difference. This section still applies if your code is to run on perl 5.18 or earlier. This module can provoke sizeable inefficiencies for regular expressions, due to unfortunate implementation details. If performance matters in your application and you don't need $PREMATCH, $MATCH, or $POSTMATCH, try doing use English qw( -no_match_vars ) ; . It is especially important to do this in modules to avoid penalizing all applications which use them. perl v5.18.2 2014-01-06 English(3pm)
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