Improving_Subprocess_Performance

   A PIPE command can generate a number of subprocesses during
   execution. Often, the applications invoked by command sequences
   do not depend on the process logical names and symbol names.
   In this case, the spawning of subprocesses can be accelerated
   by using the /NOLOGICAL_NAMES and /NOSYMBOLS qualifiers, which
   suppress the passing of process logical names and symbols to the
   subprocesses created by the PIPE command.