Thanks Steve. That makes sense now when you interpret it like that.
Jim McAlpine On 7/4/06, Steve Comstock <[EMAIL PROTECTED]> wrote:
Jim McAlpine wrote: > I'm looking at the Enterprise COBOL Performance Tuning paper regarding the > ARITH(EXTEND) compiler option which says - > > > | *ARITH - EXTEND or COMPAT > * > > | The ARITH compiler option allows you to control the maximum number of > digits allowed for decimal > > | numbers (packed decimal, zoned decimal, and numeric-edited data items and > numeric literals). With > > | ARITH(EXTEND), the maximum number of digits is 31; with ARITH(COMPAT), > the > maximum number > > | of digits is 18. However, ARITH(EXTEND) will cause some degradation in > performance for all decimal > > | data types due to larger intermediate results. The amount of degradation > that you experience depends directly > > | on the amount of decimal data that you use. > > | Performance considerations using ARITH: > > | On the average, ARITH(EXTEND) was 1% slower than ARITH(COMPAT), with a > range of equiv- > > | alent to 38% slower. > > | (*COB PG: *pp 37, 41, 48-49, 95, 283-284, 557-566) > > Can anyone say what "with a range of equivalent to 38% slower" means. It > doesn't make sense to me. I don't even think it's English. > I believe the interpretation is: "The best case was some program ran at the same speed with ARITH(EXTEND) as with ARITH(COMPAT); in the worst case, some program ran 38% slower with ARITH(EXTEND) compared to running when compiled with ARITH(COMPAT)". Kind regards, -Steve Comstock ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
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