Imported SSIS 2005 packages to 2008 version - Performance Tuning

I have imported my SSIS 2005 packages into SSIS 2008 version. It ran successfully without any error.

But in my 2005 version, packages are processing within 5-10 minutes where as the same packages in 2008 version it takes around 30-40 minutes.

Any idea about this issue?

Is there any performance tuning needs to be done to reduce the processing time?

Thanks in Advance