Nested Forms and Nested Loops

Hi,

I am writing a report. In that I am trying to write Nested Forms as shown below.

***************************************

FORM XXX.

...............

...............

PERFORM YYYY.

..............

..............

ENDFORM.

**************************************

Is that a good practice in performance pint of view. I mean, would it burden the database if we do so.

The same way, I am trying to write Nested LOOPs. Is that a good practice in performance pint of view. would it create any problem..?

Please give me your valuable inputs.

Thanks in advance.

Regards,

Pradeep.