Hi Mukesh
In addition it will also depend on how much data you are importing, whether it is a delta or full synch and how often the job is scheduled
I think you need to be more specific on your issue. There will be no stock standard answer.
If are having performance issue, have a look in marketplace as there have been some notes released. If further assistance if required, please provide context of your issue (what are you synching - connected system, input parameters, frequency, what SP are you on, etc).
Regards
Colleen