The ROBUSTREG Procedure

PERFORMANCE Statement

The PERFORMANCE statement is used to specify options that affect the performance of PROC ROBUSTREG and to request tables that show the performance options in effect and timing details. See Chen (2002) for some empirical results.

  • PERFORMANCE <options>;

You can specify the following options:

CPUCOUNT=n | ACTUAL

specifies the number of processors to use in forming crossproduct matrices. You can specify any integer in the range 1–1024 for n. CPUCOUNT=ACTUAL sets CPUCOUNT to the number of physical processors available. This can be less than the number of physical CPUs if the SAS process has been restricted by system administration tools. Setting CPUCOUNT= to a number greater than the actual number of available CPUs might result in reduced performance. This option overrides the SAS system option CPUCOUNT=. If CPUCOUNT=1, then NOTHREADS is in effect, and PROC ROBUSTREG uses singly threaded code.

DETAILS

requests the PerfSettings table that shows the performance settings in effect and the "Timing" table that provides a broad timing breakdown of the PROC ROBUSTREG step.

NOTHREADS

disables multithreaded computation. This option overrides the SAS system option THREADS.

THREADS

enables multithreaded computation. This option overrides the SAS system option NOTHREADS.