topic Re: Time difference between two date command, How? in Operating System - HP-UX

Time difference between two date command, How?

Sachin Patel — Mon, 08 Apr 2002 18:55:07 GMT

Hi All,
I have a script that runs for couple minutes to couple hours. I am trying to find out total time this script runs.
I have put a variable start_time=`date` at the begining of the script and end_time=`date` at the end. From this How can I get the total time.

Sachin

Re: Time difference between two date command, How?

Sridhar Bhaskarla — Mon, 08 Apr 2002 18:58:16 GMT

Sachin,

Did you think of the command "timex"?.

timex script

-Sri

Re: Time difference between two date command, How?

harry d brown jr — Mon, 08 Apr 2002 19:00:59 GMT

Sri,

I was thinking the same thing!

live free or die
harry

Re: Time difference between two date command, How?

S.K. Chan — Mon, 08 Apr 2002 19:01:27 GMT

# man time
I've used this in the past ..

Re: Time difference between two date command, How?

A. Clay Stephenson — Mon, 08 Apr 2002 19:01:49 GMT

The easiest method is to do this:
START=$(perl -e 'print time;')
do your stuff
FINISH=$(perl -e 'print time;')

These will return the time in epoch seconds; the elasped time is simply the difference between them.

Re: Time difference between two date command, How?

MANOJ SRIVASTAVA — Mon, 08 Apr 2002 19:09:24 GMT

Hi Sachin

timex < command > will give you the total time in terms of real usr system taken by the command.

Manoj Srivastava

Re: Time difference between two date command, How?

harry d brown jr — Mon, 08 Apr 2002 19:22:29 GMT

Clay, I like the way you think! great answer!

live free or die
harry

Re: Time difference between two date command, How?

Tom Danzig — Mon, 08 Apr 2002 19:22:53 GMT

If you're using ksh or sh, at the end of the script put:

echo Total elasped time in seconds = $SECONDS

This is a built in variable that starts at zero when the script (or shell) starts. You can echo this at any point in the script to get elapsed time so far in the execution.

Re: Time difference between two date command, How?

Sachin Patel — Mon, 08 Apr 2002 19:28:52 GMT

Hi Clay,
I am using perl now. It is working fine. I have read your previous answer (Same command) regarding some time question but It didn't make me sense there.

Sachin