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Full Discussion: How to improve the performance of this script?
Top Forums UNIX for Dummies Questions & Answers How to improve the performance of this script? Post 302865531 by Yoda on Friday 18th of October 2013 05:29:25 PM
Old 10-18-2013
You are using way too many external commands in your script which is causing it to slow down.

I would recommend using shell built-ins where ever possible to improve your script performance.

Here is an approach using ksh93 using only shell built-ins:
Code:
#!/bin/ksh93

while read line
do
        for word in $line
        do
                if [[ $word == +([0-9])\/+([0-9])\/+([0-9]) ]]
                then
                        tmp=$( printf "%(%Y-%m-%d)T" "$word" )
                        [[ -z "$str" ]] && str="$tmp" || str="$str $tmp"
                else
                        [[ -z "$str" ]] && str="$word" || str="$str $word"
                fi
        done
        printf "%s\n" "$str"
        str=""
done < file

Last edited by Yoda; 10-18-2013 at 06:35 PM.. Reason: replaced print with printf
 

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LEARN ABOUT DEBIAN

trbdf

trbdf(1)							   User Manuals 							  trbdf(1)

NAME

       trbdf - convert BDF-font from one encoding to other

SYNOPSIS

       trbdf -C | -l | -h

       trbdf [-s] [-f input-codeset ] [-t output-codeset ] [--foundry[=] new-foundry ] BDF-font

DESCRIPTION

       trbdf  is a program for translation of BDF fonts from one encoding to other.  One exciting feature of trbdf is that it tries to approximate
       the symbols that miss from the font or from the encoding of the font with existing symbols when possible.

       If the option -s or --gen-script is given trbdf will generate an awk(1) script for translation of BDF-fonts for fixed combination of input-
       codeset and output-codeset This is useful for faster convertion of many files.  This script is used as filter.

       If none of -C, -s, -l, -h and their equivalents is given the BDF-font will be read assuming it is coded with codeset input-codeset On stan-
       dard output it will be recoded so to use codeset output-codeset Both input-codeset and output-codeset are case insensitive and  default	to
       `cp1251'.

OPTIONS

       -C, --copyright
	      Display copying conditions and warranty information.

       -s, --gen-script
	      Generates conversion script for given input and output encodings instead to convert BDF-font.  This option is usefull if you have to
	      convert many fonts.  The generated script expects the input font from its standard input and outputs the converted font.

       -l, --list
	      List all known codesets.

       -h, --help
	      Display this help and exit.

       -f input-codeset, --from[=]input-codeset
	      Codeset of the source font.

       -f output-codeset, --to[=]output-codeset
	      Codeset of the generated font.

       --foundry[=]new-foundry
	      Use this option if you want to change the foundry of the generated fonts.

AUTHOR

       Anton Zinoviev <anton@lml.bas.bg>, <zinoviev@fmi.uni-sofia.bg>

SEE ALSO

       bdftopcf(1x)

trscripts							     NOV 2002								  trbdf(1)
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