{8u} RFA for backport of JDK-8199406: Performance drop with Java JDK 1.8.0_162-b32

[Poonam Parhar]

Hello,

Please approve this request to backport the following fix to 8u-dev.

Bug: JDK-8199406 <https://bugs.openjdk.java.net/browse/JDK-8199406>: 
Performance drop with Java JDK 1.8.0_162-b32
8u webrev: http://cr.openjdk.java.net/~poonam/8199406/webrev.8u/
8u review thread: 
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2018-March/028645.html
11 Changeset: http://hg.openjdk.java.net/jdk/hs/rev/d6893a76c554
11 Review thread: 
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2018-March/028632.html

Thanks,
Poonam