Hello, I do not know if it's a good forum, but I would if you know how to make an optimization on the server to reduce the TTFB. My page are very slow when I make an audit private page (lighthouse). The ttfb is th problem. I tested my application on other server, and there is no problem with the ttfb. I have a dedicated server with ispconfig. Do you know how to resolve this or to look inside the server. Thank you
Well, I guess there is no general answer to that. Easiest is to throw hardware (money) at the problem. Cheapest are the obvious things: improve caching for dynamic content, activate http2 for SSL sites, use CDN, There are tons of recommendations out there, just search for "improve TTFB" -> https://www.webpagetest.org/ -> https://www.criticalcase.com/blog/how-to-optimize-time-to-first-byte-ttfb.html
In most cases, the problem is caused by the cms or website theme and not by the server speed in general. Check if there are caching plugins available for the website cms and enable them, use a fast caching mode like something that uses Memcache or apc for caching.
