Tailoring for Performance › Determining Program Size › Optimizing Program Objects

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Optimizing Program Objects

Optimizing program objects can significantly improve performance. Use the i OS commands, Create COBOL or RPG Program (CRTCBLPGM or CRTRPGPGM) and Change Program (CHGPGM), as follows:

CRTxxxPGM PGM(library-name/program-name) +
   SRCFILE (library-name/source-file-name) +
   GENOPT(*OPTIMIZE)

Note: This is done by altering the parameters on the command in the *Messages file.

CHGPGM PGM(library-name/program-name) +
   OPTIMIZE(*YES)

For more information on the create commands and optimization parameters, see Application System/400 Programming: Control Language Reference.