Camel CXF WebService Proxy project Performance is slow for stress Test

Issue

• We are loading Red Hat JBoss Fuse Route of WS proxy using CXF component for external system hosted with .NET webservices for 1000 users and 250 threads in SOAP UI client.
• We expect response time of ESB service to be in 300ms to 1Sec however it increases to 15 sec which is not acceptable.
• We tried threadpool config but it failing to start fuse esb itself of xml parser error.