Prioritizing your application for migration to V6

In order to prioritize your migration effort to V6, this section describes a number of specific COBOL statements and data type declarations that typically perform better with V5 and V6 versus earlier releases of the compiler. This is not meant to be an exhaustive list, but instead demonstrate some specific known cases where V5 and V6 performs reliably well.

See Prioritizing your applications in the Enterprise COBOL for z/OS® Migration Guide for related information about migrating to maintain correctness of your application.

All performance measurements are compared to running the same program on the same machine level but compiled with V4. In all cases, the V4 programs were compiled with OPTIMIZE(FULL) and other options left at their default settings, except when ARITH(EXTEND) was required for the data that contained more than 18 digits.