Performance

The ability to perform subcommand processing in the CMM command exit adds significant complexity to the process over and above that required for running the command exit in the TMM. Performance through the CMM command exit, especially if subcommands are used that produce large amounts of output or require significant time to process, will be much worse than with the local, non-subcommand exit. A subcommand issued from the command exit that requires several seconds to complete could have an adverse impact on processing during periods of heavy load. In general, keep subcommands to a minimum, and, in particular, avoid using any resource-intensive subcommands.