The OPS/REXX interpreter runs many times faster than the TSO EXEC command for similar programs. Also, when you use OPS/REXX in the AOF environment, all the code is pre‑interpreted to speed processing even further. OPS/REXX generally runs so speedily that most users do not need to rewrite functions in assembler language.
OPS/REXX provides automation from the point where it intercepts messages and commands from JES2 or JES3 and z/OS. Approaches that try to use TSO/E REXX or NetView for automation are more limited; they can only compare command and message events against categories in an event table and execute a program if the event matches one of those categories.
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