optimize shell script (snapshots) Post: 302288628

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Top Forums UNIX for Dummies Questions & Answers optimize shell script (snapshots) Post 302288628 by mcW on Tuesday 17th of February 2009 02:59:07 PM

02-17-2009

Registered User

optimize shell script (snapshots)

I've a script to do some snapshots but the time it does so is very different...
once i got a snapshot under 1 sec, on the other hand it took 3 sec, but nothing else changed, i didnt even move the cursor or something.

I put the script on a ramdisk and its faster, but still swing from under 1 sec to 2 secs. What else can I do to make it faster or just steady?

Code:

until [ $A -eq 1 ] 
do 


        ## TIME
        START=$(date +%s%N)
        ##/TIME

    xwd -name "Windows XP Professional"  | xwdtopnm 2>/dev/null | pnmtopng > picci`echo $COUNTI`.png

    echo "picnumber "$COUNTI




    COUNTI=`expr $COUNTI + 1`
    if [ $COUNTI -gt 250 ]
    then
        COUNTI=0
    fi    

            ##TIME    
            END=$(date +%s%N)
            DIFF=$(( $END - $START ))
            echo "It took $DIFF seconds"
            ##/TIME
done

mcW

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LEARN ABOUT BSD

ctime

TIME(3F)																  TIME(3F)

NAME

       time, ctime, ltime, gmtime - return system time

SYNOPSIS

       integer function time()

       character*(*) function ctime (stime)
       integer stime

       subroutine ltime (stime, tarray)
       integer stime, tarray(9)

       subroutine gmtime (stime, tarray)
       integer stime, tarray(9)

DESCRIPTION

       Time returns the time since 00:00:00 GMT, Jan. 1, 1970, measured in seconds.  This is the value of the UNIX system clock.

       Ctime  converts	a  system  time  to  a	24  character ASCII string.  The format is described under ctime(3).  No 'newline' or NULL will be
       included.

       Ltime and gmtime disect a UNIX time into month, day, etc., either for the local time zone or as GMT.  The order and meaning of each element
       returned in tarray is described under ctime(3).

FILES

       /usr/lib/libU77.a

SEE ALSO

       ctime(3), itime(3F), idate(3F), fdate(3F)

4.2 Berkeley Distribution					   May 15, 1985 							  TIME(3F)

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