The following discussion helps you to obtain better performance under specific subsystems:
Use the PL/I FETCH/CALL statement instead of EXEC CICS LINK. The PL/I FETCH/CALL statement has a much shorter path length than the path length of EXEC CICS LINK.
Use Language Environment Library Routine Retention (LRR) facility to reduce the number of LOADs/DELETEs and GETMAINs/FREEMAINs issued by Language Environment for each transaction.
Preload commonly used Language Environment library modules and frequently used top-level applications.
In particular, it is especially beneficial for programs with any I/O to preload the module IBMPOIOA or to put IBMPOIOA in the LPA.