zlib configuration : system vs. bundled

[Alan Bateman]

On 15/05/2019 09:16, Baesken, Matthias wrote:
> Hi Alan,   thanks for pointing me  at the old discussion .
>
> http://mail.openjdk.java.net/pipermail/build-dev/2016-February/016602.html
>
> talks about performance benefits .  Are you aware of some  benchmarks that showed the improvements ?
If you can find the mails that references the Intel IPP library then you 
might have links to performance data comparing the different 
implementations. There is also mails somewhere in the archive with a 
proposal or patch to have the JDK select an alternative implementation 
at run-time, equivalent to LD_PRELOAD. I think we ended up with the 
right default.

>
> In reality,  if you have the latest  distro versions you might be lucky and you have a nice recent zlib 1.2.11  .
> However on older distros , you run in reality  into older zlibs  (often I see 1.2.8).  I don't think that this is a very good status .
Sure but the opposite can arise too, say where someone is using a JDK 
release that bundles an older version of zlib.

I agree with the comment that the building instructions need to be 
sync'ed up.

-Alan.