I have optimized my website and apply many advices found on the Google search. but finally i have about 400~600ms of time to first byte. Does it normal or I can lower it?
For dynamic data it it about 500~600ms base on the code that creates the content.
I think it must be lower for static files but for static files it hit the 400ms of time to first byte. why?
Using Apache2.2 on Ubuntu 12.04 VPS