05-29-2009
Nested Loop becomes slow
Hello I have some nested loop to display files and form menu item.
The part of the code is below.
I found that after runnining the script for a while the display becomes very slow.
Does ksh shell provided any easy way to release variables, reinit, etc.
while [[ $MENU_OPTION == "N" ]];do
script=0
town[0]="Start"
#Loop to display Menu Item
#
READ_OPTION="N"
while [[ $READ_OPTION == "N" ]];do
i=0
#Menu Item
clear
for file in `ls x*.txt`; do
{
((i=i+1))
town[$i]=$file
menuitem=$(print ${town[$i]} | sed -e "s/\_/ /g")
mitem=$(print $menuitem | sed -e "s/\.txt/ /g")
if (($i<10)) then
print " \c"
fi
echo "$i ":" $mitem "
}
done
...
done
...
...
..
...
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suspend(1) User Commands suspend(1)
NAME
suspend - shell built-in function to halt the current shell
SYNOPSIS
sh
suspend
csh
suspend
ksh
suspend
DESCRIPTION
sh
Stops the execution of the current shell (but not if it is the login shell).
csh
Stop the shell in its tracks, much as if it had been sent a stop signal with ^Z. This is most often used to stop shells started by su.
ksh
Stops the execution of the current shell (but not if it is the login shell).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
csh(1), kill(1), ksh(1), sh(1), su(1M), attributes(5)
SunOS 5.10 15 Apr 1994 suspend(1)