two internal table comparison (big tables)

Hi,

The internal tables contains huge data.

While Debugging this code it working fine but while executing (pressing f8) its not running the program (I mean program is continuously loading).

Please give me any advice.

LOOP AT it_tab1 INTO wa_tab1.
* loop at it_tab2 into wa_tab2
READ TABLE it_tab2 into wa_tab2 with key obj_name = wa_tab1-tablename.
* where obj_name = wa_tab1-tablename.
CLEAR wa_final.
wa_final-tablename = wa_tab1-tablename.
wa_final-description = wa_tab1-description.
wa_final-total_records = wa_tab1-total_records.
wa_final-package = wa_tab2-package.
wa_final-created_on = wa_tab2-created_on.
APPEND wa_final TO it_final.
ENDLOOP.