Subscripts vs. Indexes

[Lghtning Lad]

Hi,

In a recent performance drive it was a suggested that usage of indexes was better than subscripts and would lead to performance improvement in a COBOL code.

EXISTING CODE:

01 H-VAR.
03 H-VAR1 PIC X(5) OCCURS 10.

Will this lead to any significant performance improvement?

[dbzTHEdinosauer]

best is INDEX
then subscript defined as S9(4) COMP.

depends on how much they are used, but anything is better than nothing.
significant performance difference between INDEXs and subscripts.

but since performance of INDEXing is better than subscripting there is no reason not to use INDEXing.

[Lghtning Lad]

Will there be any significant performance improvement in terms of CPU time or will it be in nanoseconds?

[dbzTHEdinosauer]

you should be more concerned with the amount of 'nanoseconds' your program uses,
because those are nanoseconds another task does not get.

there is more going on in a computer than just your program.