There are a range of techniques for maximizing the performance of your COBOL programs. As a general rule, the simpler the operation, the faster it executes and the smaller the compiled code. For the best performance it is often better to use a number of simple operations rather than one complex operation.
These techniques for maximizing performance involve:
Optimizing Arithmetic Statements
Optimizing with Decimal Point Alignment
Optimizing Exponential Operations
Optimizing the Initialization of Data Items
Optimizing Data Manipulation and Reference Modification