Elapsed time ?

[M. Lewis]

Thanks Benjamin, Ben and Paul. I'll give this a whirl.

Thanks,
M

Benjamin Franz wrote:
> On Sun, 12 Mar 2006, M. Lewis wrote:
> 
>>
>> I'm trying to get the elapsed time. The following gives me '1', 
>> however I would like it to give me 1.98333333. Where am I missing the 
>> boat?
>>
>>
>> #!/bin/sh
>>
>> TIME1=`date +%s`
>> echo $TIME1
>> sleep 119
>> TIME2=`date +%s`
>> echo $TIME2
>>
>>
>> ELTIME=$[ ($TIME2 - $TIME1)/60 ]
>> echo $ELTIME
> 
> Do you need elapsed time _in_ your script or elapsed time _for_ your 
> script/program? If the latter,
> 
> time myscriptname
> 
> will give you good numbers (see 'man time' for info on 'time' options) a 
> lot easier.
> 
> If the former, look at the '%N' option to date (IOW: date '+%s.%N') 
> (otherwise you have up to a full second error in the timing) and bc for 
> floating point arithmetic.
> 
> #!/bin/sh
> 
> TIME1=`date '+%s.%N'`
> echo $TIME1
> sleep 2
> TIME2=`date '+%s.%N'`
> echo $TIME2
> ELTIME=`echo "($TIME2 - $TIME1)/60" | bc -l`
> echo $ELTIME
> 

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