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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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MB_STRTOUPPER(3)							 1							  MB_STRTOUPPER(3)

mb_strtoupper - Make a string uppercase

SYNOPSIS
string mb_strtoupper (string $str, [string $encoding = mb_internal_encoding()]) DESCRIPTION
Returns $str with all alphabetic characters converted to uppercase. PARAMETERS
o $str - The string being uppercased. o $encoding -The $encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used. RETURN VALUES
$str with all alphabetic characters converted to uppercase. UNICODE
For more information about the Unicode properties, please see http://www.unicode.org/unicode/reports/tr21/. By contrast to strtoupper(3), 'alphabetic' is determined by the Unicode character properties. Thus the behaviour of this function is not affected by locale settings and it can convert any characters that have 'alphabetic' property, such as a-umlaut (a). EXAMPLES
Example #1 mb_strtoupper(3) example <?php $str = "Mary Had A Little Lamb and She LOVED It So"; $str = mb_strtoupper($str); echo $str; // Prints MARY HAD A LITTLE LAMB AND SHE LOVED IT SO ?> Example #2 mb_strtoupper(3) example with non-Latin UTF-8 text <?php $str = "Txiotn a nE Baos unuvn yn, dpaokeCei unp vw0po kuvs"; $str = mb_strtoupper($st_, 'UTF-8'); _ _ _ _ echo $str; // Prints TXI>TH A/TTHH BAO> YHMNH | H, /PA>KE/EI YTTP NOOPO KYN> ?> SEE ALSO
mb_strtolower(3), mb_convert_case(3), strtoupper(3). PHP Documentation Group MB_STRTOUPPER(3)
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