I want to ask another question. My main site is www.konutkredisi.com.tr and we want to carry our site to this CDN. I changed my all static files links to CDN and host site to test.konutkredisi.com.tr
When I checked my two site’s Time To First Byte, both site’s score are so close. Why? Shouldnt My site -test.konutkredisi.com.tr with CDN- has less First Byte Time from my other site.
The Time to First Byte score and values are only reflective of the initial GET request which still resides on your webserver (213.128.74.251) . I see you have moved subsequent content (images etc) to CDN but you still answer the initial GET and respond with HTML.
There may be an option to serve a static HTML page on CDN if that is your goal? However this would probably only slightly reduce your TTFB as it would remove back end processing to generate first byte if there is any and reduce the transit time of the GET and 200OK HTML response to the client.
Your TTFB looks fine to me and gets an A result from WPT. If you want to make improvements I would focus on reducing your time to render and reviewing the page speed area of the results for pointers. ( of which there are at least 2 areas of recommendations )