DFSORT

Use the FASTSRT compiler option to improve the performance of most sort operations. With FASTSRT, the DFSORT product performs the I/O on input and/or output files named in either or both of the SORT ... USING or SORT ... GIVING statements. If you have an INPUT PROCEDURE phrase or an OUTPUT PROCEDURE phrase for your sort files, the FASTSRT option has no impact to the INPUT PROCEDURE or the OUTPUT PROCEDURE. However, if you have an INPUT PROCEDURE phrase with a GIVING phrase or a USING phrase with an OUTPUT PROCEDURE phrase, FASTSRT will still apply to the USING or GIVING part of the SORT statement. The complete list of requirements is contained in the Enterprise COBOL for z/OS® Programming Guide.