Slower performance on RT4

Good day,

I have just upgraded from our existing RT 3.8.9 to RT 4.4.4 on a staging server and while everything is working, it seems to be overall slower. For example, if I click on the Homepage link in RT3, it loads in about 1 second. On RT 4 it loads in 3-4 seconds. I enabled the Mason profiles and it corressponds with what I am seeing:

=Mason= localhost - /Elements/MyRT }}} 3.1211
=Mason= localhost - /index.html }}} 3.1642
=Mason= localhost - /Elements/Footer {{{
=Mason= localhost - /l_unsafe {{{
=Mason= localhost - /l_unsafe }}} 0.0004
=Mason= localhost - /Elements/Footer }}} 0.0013
=Mason= localhost - /autohandler }}} 3.1836
=Mason= localhost - /index.html }}} ENDS

The only places where I can see things that take a bit of time is here:

Mason= localhost - /Elements/CollectionAsTable/Row {{{
=Mason= localhost - /Elements/CollectionAsTable/Row }}} 0.0032
=Mason= localhost - /Elements/CollectionList }}} 2.1125
=Mason= localhost - /Widgets/TitleBoxStart {{{
=Mason= localhost - /Widgets/TitleBoxStart }}} 0.0008
=Mason= localhost - /Widgets/TitleBoxEnd {{{
=Mason= localhost - /Widgets/TitleBoxEnd }}} 0.0006
=Mason= localhost - /Widgets/TitleBox }}} 2.1145
=Mason= localhost - /Elements/ShowSearch }}} 2.1185
=Mason= localhost - /Elements/ShowSearch {{{

Can anyone perhaps point me to something I can investigate? Or is this just normal for RT4?

Thanks

Chris