apache modules

hi,

I am just looking to improve apache performance. so there are a lot of modules activated by default in plesk. I would think that the following modules could be disabled. could anyone have a look if plesk itself needs any of this modules or if it's worth disabling them for performance - does anyone have recommendations which modules are needed for a normal webserver?

disable:
proxy_balancer
proxy_ajp
proxy_express
proxy_fcgi
proxy_fdpass
proxy_ftp
proxy_scgi
proxy_wstunnel

needed - or...

apache modules