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Full Discussion: awk script performance issue
Top Forums UNIX for Dummies Questions & Answers awk script performance issue Post 302885887 by Ariean on Tuesday 28th of January 2014 05:42:58 PM
Old 01-28-2014
awk script performance issue

Hello All,
I have the below excerpt of code in my shell script and it taking long time to complete, though it prints the output quickly. Is there a way to make it come out once it finds the first instance as the file size of 4.7 GB it could be going through all lines of the data file to find for any more instances of what it is searching for.


Code:
tr -d '\000' < file_2013-12-31_5_v2.5.xml | awk -v RS="<" -F'"' '/[sS][cC][hH][eE][mM][aA]_[vV][eE][rR][sS][iI][oO][nN]=/ {for(i=1;i<=NF;i++)if($i~/[sS][cC][hH][eE][mM][aA]_[vV][eE][rR][sS][iI][oO][nN]=/) print $(i+1) }'
2.5


Thank you.
 

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SHTOOL-PATH.TMP(1)					      GNU Portable Shell Tool						SHTOOL-PATH.TMP(1)

NAME
shtool-path - GNU shtool command dealing with shell path variables SYNOPSIS
shtool path [-s|--suppress] [-r|--reverse] [-d|--dirname] [-b|--basename] [-m|--magic] [-p|--path path] str [str ...] DESCRIPTION
This command deals with shell $PATH variables. It can find a program through one or more filenames given by one or more str arguments. It prints the absolute filesystem path to the program displayed on "stdout" plus an exit code of 0 if it was really found. OPTIONS
The following command line options are available. -s, --suppress Supress output. Useful to only test whether a program exists with the help of the return code. -r, --reverse Transform a forward path to a subdirectory into a reverse path. -d, --dirname Output the directory name of str. -b, --basename Output the base name of str. -m, --magic Enable advanced magic search for ""perl"" and ""cpp"". -p, --path path Search in path. Default is to search in $PATH. EXAMPLE
# shell script awk=`shtool path -p "${PATH}:." gawk nawk awk` perl=`shtool path -m perl` cpp=`shtool path -m cpp` revpath=`shtool path -r path/to/subdir` HISTORY
The GNU shtool path command was originally written by Ralf S. Engelschall <rse@engelschall.com> in 1998 for Apache. It was later taken over into GNU shtool. SEE ALSO
shtool(1), which(1). 18-Jul-2008 shtool 2.0.8 SHTOOL-PATH.TMP(1)
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