Nuxt usage of scanDirExports is extremly slow if Nuxt is used with layers

[fabianwohlfart]

Environment

Operating System: Darwin
Node Version: v22.11.0
Nuxt Version: 3.14.1592
CLI Version: 3.16.0
Nitro Version: 2.10.4
Package Manager: npm@10.9.0
Builder: -
User Config: default
Runtime Modules: -
Build Modules: -

Reproduction

https://github.com/fabianwohlfart/test__nuxt-layers-slowdown

Describe the bug

I basically want to raise awareness in this repo.

Nuxt uses scanDirExports from unimport here: https://github.com/nuxt/nuxt/blob/main/packages/nuxt/src/imports/module.ts
It seems like that more folders than expected are scanned, if Nuxt layers are used.

I raised an issue in Nuxt with details here:
nuxt/nuxt#30137

The reproduction is a Nuxt app with layers.
If a layer is a sibling of a folder with a lot of files, these slow down the bundling.

Going back to Unimport 3.13.4 solves the issue (tinyglobby??!)

  "devDependencies": {
    "unimport": "3.13.4"
  },
  "overrides": {
    "unimport": "3.13.4"
  }

Additional context

No response

Logs

No response

[fabianwohlfart]

tinyglobby got back to me, it's already fixed in their upcoming release.

"overrides": {
  "tinyglobby": "https://pkg.pr.new/tinyglobby@d51e2b9"
}