Submitter observing ~10% regrssion compared to 12.2.1 RC3a.

From profile analysis they observed that
  
"oracle.xml.parser.v2.XMLNode.xdkInit" method
which is consuming more time.

Build Info:
SOA Version: 12.2.2.0.0-151122.1100.1439
WebLogic Server 12.2.2.0.0 Mon Nov 16 18:04:03 PST 2015 1740965

DIAGNOSTIC ANALYSIS
-------------------
Sampling profile
12.2.2 -151122
44,624 ms oracle.j2ee.ws.saaj.soap.soap11.SOAPImplementation11.createElement
  43,209 ms oracle.j2ee.ws.saaj.soap.soap11.Element11.<init>
   43,209 ms oracle.j2ee.ws.saaj.soap.ElementImpl.<init>
    43,209 ms oracle.xml.parser.v2.XMLElement.<init>
     33,482 ms oracle.xml.parser.v2.XMLNSNode.<init>
  30,378 ms oracle.xml.parser.v2.XMLNode.<init>
   30,378 ms oracle.xml.parser.v2.XMLNode.xdkInit
       
12.2.1-151013
 30,428 ms oracle.j2ee.ws.saaj.soap.soap11.SOAPImplementation11.createElement
  28,986 ms oracle.j2ee.ws.saaj.soap.soap11.Element11.<init>
   27,284 ms oracle.j2ee.ws.saaj.soap.ElementImpl.<init>
    27,284 ms oracle.xml.parser.v2.XMLElement.<init>
     21,759 ms oracle.xml.parser.v2.XMLNSNode.<init>
  20,539 ms oracle.xml.parser.v2.XMLNode.<init>
   20,539 ms oracle.xml.parser.v2.XMLNode.xdkInit
   
12.2.1- 151013
Runtime JDK Version
java version "1.8.0_40-ea"
Java(TM) SE Runtime Environment (build 1.8.0_40-ea-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.40-b12, mixed mode)

12.2.2-151122
java version "1.8.0_51"
Java(TM) SE Runtime Environment (build 1.8.0_51-b16)
Java HotSpot(TM) 64-Bit Server VM (build 25.51-b03, mixed mode)