I'm testing response time of my VPS server:
curl -s -w %{time_total}\\n -o /dev/null http://www.example.com
The values are typically round 300ms, Google suggests that it should be lower than 200.
Looks like this does not depend on the CMS used, the same with Wordpress and other platforms. Simple php pages with almost no includes have values round 175.
Maybe it's some Apache or DNS misconfiguration?
How would you debug this and see how to improve the response time?