hw to reduce the report execution time?

Hi Friends

Iam wrking performance tuning. my requirement is to reduce the execution time.

i removed usage os "TYPE and complex innerjoins that is defined on morethan 4 tables"

now if i see in the runtime analysis the databasetime reduced from 90% to 50% and abap time is incresed 5% to 40 % but the toatl cpu time increased from 19540 to 39678. then definetly exection time will increase

could tell me how to decrease the excution time.

thanks in advance.

regards

priya