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User has an environment that creates JavaScript "rules" and
executes them. It was noticed that with java-1.7.0-openjdk
using rhino it runs almost 20 times faster.

  A similar bug report to upstream exists at
https://bugs.openjdk.java.net/browse/JDK-8034959

[more information follow]

Created attachment 1221905 [details]
1.7.0-perf.txt

Sample perf output when running with java-1.7.0-openjdk (rhino)

Created attachment 1221907 [details]
1.8.0-perf.txt

Sample perf output when run with java-1.8.0-openjdk (nashorn)

User's test creates new short lived javascript functions that are executed in a loop. Nashorn is not designed to handle such workload efficiently: each new function is compiled to bytecodes so with nashorn a big part of this test's execution is spent spinning bytecodes. As pointed above this is a known issue upstream and it seems the recommendation is to use rhino with jdk 8:

https://wiki.openjdk.java.net/display/Nashorn/Using+Rhino+JSR-223+engine+with+JDK8

Should, or does rhel 6 and 7, already have a package with rhino ready
to use with jdk 8?

  Replying to myself, and adding needinfo.

https://admin.fedoraproject.org/pkgdb/package/rpms/rhino/

needs epel6 and epel7 branches, or, a rhel package. Should also update
to Rhino 1.7.7.1 released February 2, 2016.

Please ignore the request for rhino epel branch.
For some reason I did not find it was in rhel already.
So, the solution currently should be to use rhel rhino and
procedures described at
https://wiki.openjdk.java.net/display/Nashorn/Using+Rhino+JSR-223+engine+with+JDK8

Paulo: is there anything any more you need from us? Should we close that bug now that there's a workaround?

  Hi Roland,

  Yes, the bug can be closed. May thanks for your help.