Use of USROPN

I'm going to be receiving transmissions from laptop PC's.  The
transmission will be a file with various record types which are:

        orders
        payments
        pickups
        Email
        host file maintenance

These will be processed into various host files by my RPG program. 
Altogether, there are 16 host files in use defined in the program.  Each
of the above record types is placed into a different host transaction
file, and requires different host files for editing, reference, etc.

Question 1
==========
Nine out of 10 transmissions will be orders only.  That means 90% of the
time, at least 9 of these files will not be used at all when the program
is invoked.  I assume that making those 9 files USROPN will improve the
performance of the program because I will only open those files if and
when needed.  Correct?

Question 2
==========
Probably 999 times out of 1000, there _will_ be orders in this
transmission.  There are 7 files that are needed to process orders and
therefore will be opened 999 out of 1000 times this program is invoked. 
If I make these 7 files (that are used virtually every time) USROPN as
well and open them only if needed, will that be a performance _hit_ of
any kind over not defining them as USROPN?

Thanks.


-- 
-Jeff

jlcrosby@fwi.com
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