Echo JS 0.11.0

The article itself is less about TTFB than it is with initial connection negotiation between HTTP/(1|2|3), HTTPs and other variables.

What's totally missing is DNS negotiation, for first calls, a slow DNS provider and/or the use of too many domains for content/services and raw initial payload response, such as using a static content server with pre-compressed content and/or a cdn.

While a little dated, the content in "High Performance Web Sites" and "Even Faster Web Sites" books is still very relevant.

Also for the TTFB part and entire lighthouse thing you can go through. 

https://ashu.online/blogs/lighthouse-performance-auditing-things-you-should-know

Thanks for the suggestions. I have a separate article on DNS resolution. 
Instead of putting everything into a single article. I am planning to put detailed things about each step of web performance optimization in a separate article.

Please share if you have any other suggestions.

https://ashu.online/blogs/optimize-dns-resolution-for-fast-website