SSRANGE
SSRANGE is a parameter that should only be used during development. Additional overhead is needed to check the validity of index and subscript references during run time. The default is NOSSRANGE.
Using SSRANGE with CHECK(ON) is slower than NOSSRANGE.
Using SSRANGE with CHECK(OFF) is also slower than NOSSRANGE.
Starting with Enterprise COBOL 5.1, SSRANGE checks cannot be disabled at runtime.