03-14-2012
Can someone please help me optimize my code (script searches subdirectories)?
Here is my code. What it does is it reads an input file (input.txt which contains roughly 2,000 search phrases) and searches a directory for files that contains the search phrase. The directory contains roughly 1900 files and 84 subdirectories. The output is a file (output.txt) that shows only the file names that contains the searched keyword. I timed this code and it took roughly 3.38 hours to run!!! Can someone help me optimize my code? Or provide my with some suggestions?
HTML Code:
#!/bin/sh
start=$SECONDS
while read word
do
a=$(find /path/to/files -exec grep -wi $word /dev/null {} \; | sort -u | cut -d \: -f1)
if [ -n "$a" ]; then
echo "$word is found in: $a"
fi
echo ""
done < input.txt >> output.txt
end3=$SECONDS
echo "Total Runtime: $((end3 - start3)) secs."
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LEARN ABOUT NETBSD
zfgrep
ZGREP(1) BSD General Commands Manual ZGREP(1)
NAME
zgrep, zegrep, zfgrep -- print lines matching a pattern in gzip-compressed files
SYNOPSIS
zgrep [grep-flags] [--] pattern [files ...]
zegrep [grep-flags] [--] pattern [file ...]
zfgrep [grep-flags] [--] pattern [file ...]
DESCRIPTION
zgrep runs grep(1) on files or stdin, if no files argument is given, after decompressing them with zcat(1).
The grep-flags and pattern arguments are passed on to grep(1). If an -e flag is found in the grep-flags, zgrep will not look for a pattern
argument.
zegrep calls egrep(1), while zfgrep calls fgrep(1).
EXIT STATUS
In case of missing arguments or missing pattern, 1 will be returned, otherwise 0.
SEE ALSO
egrep(1), fgrep(1), grep(1), gzip(1), zcat(1)
AUTHORS
Thomas Klausner <wiz@NetBSD.org>
BSD
December 28, 2003 BSD