GetPrimitiveArrayCritical vs GetByteArrayRegion: 140x slow-down using -Xcheck:jni and java.util.zip.DeflaterOutputStream

[Ian Rogers]

Thanks, via bugreport.java.com I filed bugs/RFEs with ids 9053047, 9053048,
9053049, 9053050 and 9053051.
Ian

On Mon, Mar 19, 2018 at 2:28 AM Thomas Schatzl <thomas.schatzl at oracle.com>
wrote:

> Hi,
>
> On Fri, 2018-03-16 at 17:19 +0000, Ian Rogers wrote:
> > Thanks Paul, very interesting.
> >
> > On Fri, Mar 16, 2018 at 9:21 AM Paul Sandoz <paul.sandoz at oracle.com>
> > wrote:
> > > Hi Ian, Thomas,
> > >
> > > [...]
> > > (This is also something we need to consider if we modify buffers to
> > > support capacities larger than Integer.MAX_VALUE. Also connects
> > > with Project Panama.)
> > >
> > > If Thomas has not done so or does not plan to i can log an issue
> > > for you.
> > >
> >
> > That'd be great. I wonder if identifying more TTSP issues should also
> > be a bug. Its interesting to observe that overlooking TTSP in C2
> > motivated the Unsafe.copyMemory change permitting a fresh TTSP issue.
> > If TTSP is a 1st class issue then maybe we can deprecate JNI critical
> > regions to support that effort :-)
>
> Please log an issue. I am still a bit unsure what and how many issues
> should be filed.
>
> @Ian: at bugreports.oracle.com everyone may file bug reports without
> the need for an account.
> It will take some time until they show up in Jira due to vetting, but
> if you have a good case, and can e.g. link to the mailing list, this
> should be painless.
>
> Thanks,
>   Thomas
>
>