TR is slow for a single instruction, but it's way faster than the
alternative of a byte-at-a-time instruction loop.
In the z890/z990/z9, the TR instruction (and its cousins) are supposedly
handled in the same co-processor which handles encryption, to improve
performance. I haven't tried to benchmark it.
--
Bruce A. Black
Senior Software Developer for FDR
Innovation Data Processing 973-890-7300
personal: [EMAIL PROTECTED]
sales info: [EMAIL PROTECTED]
tech support: [EMAIL PROTECTED]
web: www.innovationdp.fdr.com
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