[vcf-midatlantic] COBOL: vintage vs. legacy code

Dave McGuire mcguire at neurotica.com
Thu Jun 1 15:41:21 EDT 2017


On 06/01/2017 03:25 PM, Evan Koblentz via vcf-midatlantic wrote:
> True story: I was talking on the phone just now with a high-level
> Z-Systems software executive at IBM, who said (unprodded by me), "If you
> really want to be efficient, go make sure you use the exact right
> assembler instruction code to get the most out of the system."

  This has always been the case, on all architectures except the very
complex ones with branch delay slots, etc that can be more effectively
scheduled by a compiler.  It's still very much the case in a very CISC
architecture like IBM z.

            -Dave

-- 
Dave McGuire, AK4HZ
New Kensington, PA



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