OPTIMIZE compiler option
In the OS/390® V1R2,
V1R3, V2R4, and V2R5 C/C++ compilers:
- OPT(0) mapped to NOOPT
- OPT and OPT(1) mapped to OPT(1)
- OPT(2) mapped to OPT(2)
As of OS/390 V2R6
C/C++:
- OPT(0) maps to NOOPT
- OPT, OPT(1) and OPT(2) map to OPT(2)
As of z/OS® V1R5 C/C++, OPT(3) provides the compiler's highest and most aggressive level of optimization. OPT(3) is recommended only when the desire for runtime improvement outweighs the concern for minimizing compilation resources.