Size after building is bigger with components: true

Describe the bug
If the option components in nuxt-config.js is set to False, I get the following result after nuxt build

But if I set the option to True, I get the following :

There is a little difference of size in entrypoint, but there are some huge differences in size in the other files. Is that what is expected ?

To Reproduce
Steps to reproduce the behavior:

"dependencies": {
    "nuxt": "2.15.8",
    "vue": "2.6.14",
  },
  "devDependencies": {
    ..
5189
.
    "webpack": "^4.46.0"
  }

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