How can I optimize webpack dynamic import 5,000+ modules

Question

In my case, use Vue with vue-cli-service

When I use 'vue-cli-service serve' meet heap size out error

Then I found 5,000+ .json in webpack-dev-server and some code dynamic import it.

e.g. await import(@static/json/{name}.json)

I think It makes heap size out error.

Because webpack dynamic import get all modules then filter it.

How can I optimize..?

split directory?