프론트 페이지가 느리다면

화면 렌더링이 느리다! 왜때문?!

CASE#1. AJAX의 응답시간이 느림

Waiting (TTFB).
The browser is waiting for the first byte of a response. TTFB stands for Time To First Byte. This timing includes 1 round trip of latency and the time the server took to prepare the response.

CASE#2. DOM 렌더링이 느림

Reference

• https://developer.chrome.com/docs/devtools/network/reference/?utm_source=devtools#timing-explanation
• https://web.dev/custom-metrics/?utm_source=devtools#server-timing-api