It's normal to the development environment be slow to load?

I want to do some layout customisations to jitsi, so I made a fork in the jitsi-meet repo, done a npm install and after this a make dev commad. But it’s extremely slow to open the application in the browser, https://localhost:8080/ is lin a endless loading.

Am I doing something wrong?
Someone have some tips to give to me?

Thank you guys for the help!

make dev make take a bit to run since it must build the app bundle on the fly. Do you see any errors either on the JS console or your terminal?

The first load requires a lot of js to download, so it’s slow