Just a thought, impossible to prove or disprove without sight of the code.
If the Assembler references (and modifies) data from within 256 bytes of the instruction on the latest IBM z-Gizmos, does it not take a cache line hit or some such? And does that not cripple the instruction execution performance? Of late, I have been instinctively inserting a 256-byte "filler" between the last instruction and the LTORG. In my test environment it makes not a jot of difference, but on the big boxes.. Well it does no harm. IATF MKB
