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From Steve Goldsmith <sgj...@gmail.com>
Subject Re: JPA vs DBUtils
Date Tue, 20 Jun 2017 13:58:19 GMT
I copied the JPA stuff from the TomEE examples, so if it is not optimized,
using the wrong state, scope, etc. then perhaps the example should be
updated to reflect that. I will try what you recommend and post new times.
The data is exactly the same size, so are you saying because the strings
are not identical there may be a difference? Just trying to understand that
perspective. I'll just roll both tests into one to use the same data.

On Tue, Jun 20, 2017 at 2:53 AM, Andy Gumbrecht <agumbrecht@tomitribe.com>
wrote:

> So just at a super quick glance - Before we start to anything else.
>
> You should modify the code to use the same (identical) random data for both
> tests.
> Add hibernate.jdbc.batch_size = 25 to your persistence.xml properties
> Never use @Stateful unless you really understand why you should, i.e. use
> @Stateless for your JpaMovies
> Use entityManager#find rather than a query
>
> Hope this is a quick insight, but I'd also be interested to see the results
> on just these few changes.
>
> Andy.
>
> On 20 June 2017 at 05:31, Laird Nelson <ljnelson@gmail.com> wrote:
>
> > Have you sat down for a good long reading session with
> > http://java-persistence-performance.blogspot.com/?  I found that site
> > invaluable.
> >
> > Best,
> > Laird
> > --
> > http://about.me/lairdnelson
> >
> > On Mon, Jun 19, 2017 at 8:22 PM sgjava <sgjava@gmail.com> wrote:
> >
> > > I just built a project to compare JPA+Hibernate to a DBUtils
> > > implementation.
> > > DBUtils is a lot faster by a large margin. Can anyone tell me if they
> > have
> > > tuned JPA to perform better? I used TomEE 7.0.4-SNAPSHOT. I could live
> > with
> > > maybe a 10% difference, but I'm talking about 10 to 10 times slower!
> > >
> > > https://github.com/sgjava/jpavsdbutils
> > >
> > >
> > >
> > > --
> > > View this message in context:
> > > http://tomee-openejb.979440.n4.nabble.com/JPA-vs-DBUtils-
> tp4681918.html
> > > Sent from the TomEE Users mailing list archive at Nabble.com.
> > >
> >
>
>
>
> --
>   Andy Gumbrecht
>   https://twitter.com/AndyGeeDe
>   http://www.tomitribe.com
>



-- 
Steven P. Goldsmith

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