Hello, have you got chance to review the pagespeed insights report:

• https://pagespeed.web.dev/analysis/https-wavbor-com/p9zryy2w6a?form_factor=desktop
• https://pagespeed.web.dev/analysis/https-dev-wavbor-com/nfn120qqwg?form_factor=desktop

The info provided by Google in that report is more than enough to help you get started with optimization tips. You should see if your JS is well-optimised and if you’re not imposing a lot of unnecessary code, libraries, images, fonts, etc.

You can also enable Speed Insights on your project to constantly monitor.

Thank you for your answering. But what I wanna say is it was suddenly from yesterday morning. It have been working well 2 days ago. That's what I want yours check vercel infra.

*How can I set/lead vercel edge network to "icn1"?

i think same issue in here

https://community.vercel.com/t/network-connectivity-issue-slow-or-unreachable-requests-to-vercel/5746

Vercel Community

Network Connectivity Issue – Slow or Unreachable Requests to Vercel

🚀 Issue Summary I am experiencing severe latency issues and resource loading failures when accessing my Vercel-hosted website. This issue occurs only on...