grep-speed-test.sh

#!/bin/sh

file="$1"
grep_string="$2"

s=`date`

echo grep direct: `date`
echo grep 1; time grep "$grep_string" "$file" > /dev/null
echo grep 2; time grep "$grep_string" "$file" > /dev/null

echo fgrep direct: `date`
echo fgrep 1; time fgrep "$grep_string" "$file" > /dev/null
echo fgrep 2; time fgrep "$grep_string" "$file" > /dev/null

echo cat grep: `date`
echo cat grep 1; time cat "$file" | grep "$grep_string" > /dev/null
echo cat grep 2; time cat "$file" | grep "$grep_string" > /dev/null

echo cat fgrep: `date`
echo cat fgrep 1; time cat "$file" | fgrep "$grep_string" > /dev/null
echo cat fgrep 2; time cat "$file" | fgrep "$grep_string" > /dev/null

e=`date`; printf "\nStart:\t%s\nEnde:\t%s\n" "$s" "$e"

exit $?
# EOF