How do you increase the speed of a project that has thousands of files?

[Nefcanto]

We were using CRA (create react app) and after a while, it took us more than a minute to compile. Then we migrated to Vite. After that, our project would be compiled in less than a second, but then we encountered a more serious problem.

Our project contains more than 2 thousand JSX files. It takes more than 50 seconds to load in the browser.

So, basically, the value of fast compilation is thrown out of the window because of the slowness in loading the app in the browser.

What would you do to make it faster?

Slow.mp4

See the pain we should tolerate to hit the refresh button?

[Nefcanto]

Any ideas?