RE: Speed issues?

["Joe Pluta" <joepluta@xxxxxxxxxxxxxxxxx>]

> From: Robert Upshall
>
> The application does allot of things, basically I will load a JList from a
> customer DB2 file on the as400, then based on who was select do a
> key lookup
> with KeyedFile, maybe to 1 or more files depending on the situation.

I'm betting that the actual KeyedFile read doesn't take nearly as much time
as the open of the file.  Using RLA, you're going to find a lot of overhead
associated with opening a file.  If you start your application by opening
all your files, then you'll find your access is considerably faster.  RPG is
highly optimized to allow fast opening of files; these optimizations aren't
available for Java code.

As to reading a large block of data (many records) your overhead there will
be in communications and EBCDIC-ASCII conversion.  I think you'll find RLA
performance closer to that of a program call in that case.

Finally, I'd suggest getting the latest version of JTOpen.  Each release
tries to enhance performance a little bit.

Joe