Speed up tomcat

sudo mcedit /opt/site/conf/server.xml

find
    <Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               URIEncoding="UTF-8"
               redirectPort="8443" />

change to

    <Connector port="8080" protocol="org.apache.coyote.http11.Http11NioProtocol"
               connectionTimeout="20000"
               URIEncoding="UTF-8"
               redirectPort="8443" />
done.

check: Connector Comparison