Re: Speed up Java on i

If you only have one core you really aren't going to get much benefit from
5 jvms, and your going to have the overhead of 5 jvms using up memory.

You could try parallel streams to reduce the jvm overhead, but your always
going to be limited because of 1 core, so all your really saving is memory
usage and a little wait time...

How many cores on your test and prod boxes?

On Thu, 3 Dec 2020, 18:02 Logic IT: K. Fritz, <[email protected]> wrote:

> Hi Colin,
>
> Thanks for the hint.
> No, i started  5 jvm jobs.
> Here it's a dev box, only 1 core.
>
> Karl
> -----Ursprüngliche Nachricht-----
> Von: JAVA400-L [mailto:[email protected]] Im Auftrag
> von
> Colin Williams
> Gesendet: Donnerstag, 3. Dezember 2020 18:57
> An: Java Programming on and around the IBM i
> Betreff: Re: Speed up Java on i
>
> Are you only running this in 1 jvm?
>
> How many cores does your ibmi have?
>
> I would suggest using parallel streaming. Its pretty easy to do in java and
> allows you to make use of all cores.
>
> https://www.geeksforgeeks.org/what-is-java-parallel-streams/
>
> Ive never done this on ibmi but it works well on windows, so not sure what
> it would do to your overall system performance if you have other things
> running on the box...
>
> Cheers
> Colin
>
> On Mon, 23 Nov 2020, 19:39 Logic IT: K. Fritz, <[email protected]> wrote:
>
> > Hi,
> >
> >
> >
> > I've a very special case of a customer.
> >
> > Case:     Printing a QR Code with the Swiss flag in the middle.
> > (Direction!)
> >
> > Printerfiles are not able to do that, QR-Codes yes, but not with an
> > embedded
> > picture.
> >
> >
> >
> > So I've wrote a small ZXING Java program and a colleague a DataQ server
> > program to prevent multiple starts of the JVM.
> >
> > But it's still too slow! For 1000 QR Codes needs my i9 3 Min and the
> > customer talks about 2 Million documents with a QR-Code.
> >
> >
> >
> > How can I achieve much more speed to run the java prog?
> >
> > This customer wants a full IBM i solution.
> >
> >
> >
> > Who can give me a good advice.
> >
> >
> >
> > Thanks and take care.
> >
> > Karl
> >
> > --
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