Improving performance by updating the PROGxx member

On systems where application development is the primary activity, making certain changes to the PROGxx member of SYS1.PARMLIB might improve performance. For example:

SYS1.PARMLIB(PROGxx)      
 LPA,ADD,MODNAME(CEEBINIT,CEEBLIBM,CEEEV003,EDCZV),DSNAME(CEE.SCEERUN)       
 LPA,ADD,MODNAME(IEFIB600,IEFXB603),DSNAME(SYS1.LINKLIB)

Rule: Your primary Language Environment® level must be the default level for the release, and you must be using the default compiler. To verify your Language Environment primary level, check that the library name (for example, CEE.SCEERUN) appears first in the linklist concatenation in the LNKLSTxx member of SYS1.PARMLIB.