4.2 seems to be a little bit faster then 4.1, however I too is experiencing slowness with 4.2.2. Pages take forever to load up, sign in takes nearly 10 minutes.
I tried this
a. Open the properties file name “gs.properties” under the path NMSROOT/MDC/tomcat/webapps/cwlms/WEB-INF/classes/com/cisco/nm/gs/ui
b. Update the field IS_DEFAULT_PAGE as “false”
c. Clear the browser cache and login-in(Daemon restart not required)
Still no luck