Upgrading from tomcat 6 to tomcat 8 | Performance goes down (Http requests)

[vikas chandra yadav]

Hi,
I am upgrading from tomcat 6 to tomcat 8.
My throughput get decreased by 40%.

Simple sending http request from jmeter using 40 threads.
In tomcat 6 it is 110000
in tomcat 7(last version) it si 108000
in tomcat 8 - 80000

Please suggest if we have to disable any auto enavle feature of do tuning.

Thanks & Regards,
Vikas