SAS Certification Prep Guide, 4th Edition

Summary

Executing Only Necessary Statements

You minimize the CPU time that SAS uses when you execute the minimum number of statements in the most efficient order.

For a more efficient program, place the subsetting IF statement as soon as logically possible in a DATA step when creating a subset of data.

Review guidelines for using conditional logic efficiently with IF-THEN/ELSE statements or SELECT statements. Remember to minimize the number of statements that use SAS functions or arithmetic operators.

Conditionally execute only necessary statements by placing statements in groups that are associated with IF-THEN/ELSE statements or SELECT/WHEN statements. Groups of statements execute only when a particular condition is true. Review the criteria ...