Liferay - How to trun on unwanted features of liferay to increase performance?

In portal-ext.properties file add following entries.

# Turn off Liferay features not used
com.liferay.portal.servlet.filters.gzip.GZipFilter=false
com.liferay.portal.servlet.filters.strip.StripFilter=false
com.liferay.portal.servlet.filters.sso.cas.CASFilter=false
com.liferay.portal.servlet.filters.sso.ntlm.NtlmFilter=false
com.liferay.portal.servlet.filters.sso.opensso.OpenSSOFilter=false
com.liferay.portal.sharepoint.SharepointFilter=false
com.liferay.portal.servlet.filters.validhtml.ValidHtmlFilter=false
session.tracker.memory.enabled=false

counter.increment=2000
portlet.css.enabled=false