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"date2 - date1": elapsed time in hrs, mins, and secs

Posted on 2004-08-06
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Last Modified: 2010-04-21
How to calculate the elapsed time in hrs, mins, and secs:

For example, in the script, it has

d1=`date`
......
d2=`date`

How to get the time difference between d2 and d1.

Thanks.
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Question by:geermu
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by:
sunnycoder earned 252 total points
ID: 11733410
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Expert Comment

by:Tintin
ID: 11748780
As an alternative.

man time
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by:glassd
glassd earned 248 total points
ID: 11771799
Perl's Date::Calc module is ideal for this task.
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Expert Comment

by:ITcrow
ID: 11865515

You have multiple options here:

perl:  
$start_time = time();
<Your Script Here>
$end_time  = time();
$time_taken =  $start_time - $end_time;

Or use some CPAN module: benchmark, Date::Calc, etc.

*nix Shell Cmd Line:
prompt> time <Your Script Here>

I am not aware which shell you are working in. Otherwise I could have suggested
a shell specific calculation.

Use of perl will make it Shell and OS independent, which is a good thing in long run.

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