Firebase hosting with next.js app router deployment speed

[LorenzoYeKai]

Hi,
we recently deployed a project built in next.js 14 with app router through firebase hosting and we notices extremely elevated deployment time, in the order of 10 to 20 minutes.
We noticed 2 bottlenecks. The first one is the deployment of the SSR cloud function.
The second one is the generation of the service identity for eventarc.googleapis.com.

I want to understant if we are doing something wrong as a deployment this slow is very inconvenient.

This is the firebase.json file

  {
    "hosting": {
      "source": ".",
      "ignore": ["firebase.json", "**/.*", "**/node_modules/**", ".next/**"],
      "frameworksBackend": {
        "region": <region>
      }
    }
  }

This is the deplyment log:

✓ Compiled successfully

   Linting and checking validity of types ...

   Collecting page data ...

(node:34282) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)

(node:34285) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)

   Generating static pages (0/7) ...

(node:34283) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)

   Generating static pages (1/7) 

(node:34286) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)

   Generating static pages (3/7) 

   Generating static pages (5/7) 

 ✓ Generating static pages (7/7) 

   Finalizing page optimization ...

   Collecting build traces ...



Route (app)                              Size     First Load JS
┌ ○ /                                    23.3 kB         118 kB
├ ○ /_not-found                          885 B          85.6 kB
├ ○ /<page>                               138 B          84.9 kB
├ λ /<page>/[slug]                      18.3 kB         307 kB
└ ○ /<page>                              775 B          95.8 kB
+ First Load JS shared by all            84.7 kB
  ├ chunks/13-051d953b78acf82d.js        29.2 kB
  ├ chunks/c2a6b034-96553f43a0c18584.js  53.4 kB
  └ other shared chunks (total)          2.19 kB



○  (Static)   prerendered as static content
λ  (Dynamic)  server-rendered on demand using Node.js


Building a Cloud Function to run this application. This is needed due to:
 • non-static <component-name>

128 packages are looking for funding
  run `npm fund` for details

=== Deploying to <project-name>...

i  deploying functions, hosting
i  functions: preparing codebase <codebse-name> for deployment
i  functions: ensuring required API cloudfunctions.googleapis.com is enabled...
i  functions: ensuring required API cloudbuild.googleapis.com is enabled...
i  artifactregistry: ensuring required API artifactregistry.googleapis.com is enabled...
✔  functions: required API cloudbuild.googleapis.com is enabled
✔  functions: required API cloudfunctions.googleapis.com is enabled
✔  artifactregistry: required API artifactregistry.googleapis.com is enabled
⚠  functions: package.json indicates an outdated version of firebase-functions. Please upgrade using npm install --save firebase-functions@latest in your functions directory.
i  functions: Loading and analyzing source code for codebase<codebse-name> to determine what to deploy
Serving at port 8231

i  functions: Loaded environment variables from .env.
i  functions: preparing .firebase/<project-name>/functions directory for uploading...
i  functions: packaged <path> (357.07 MB) for uploading
i  functions: ensuring required API run.googleapis.com is enabled...
i  functions: ensuring required API eventarc.googleapis.com is enabled...
i  functions: ensuring required API pubsub.googleapis.com is enabled...
i  functions: ensuring required API storage.googleapis.com is enabled...
✔  functions: required API storage.googleapis.com is enabled
✔  functions: required API eventarc.googleapis.com is enabled
✔  functions: required API run.googleapis.com is enabled
✔  functions: required API pubsub.googleapis.com is enabled
i  functions: generating the service identity for pubsub.googleapis.com...
i  functions: generating the service identity for eventarc.googleapis.com...
✔  functions: <path> folder uploaded successfully
i  hosting[<project-name>]: beginning deploy...
i  hosting[<project-name>]: found 72 files in <path>
✔  hosting[<project-name>]: file upload complete
i  functions: updating Node.js 20 (2nd Gen) function <function-name>...
✔  functions[<function-name>] Successful update operation.
Function URL (<function-name>): <url>
i  functions: cleaning up build files...
i  hosting[<project-name>]: finalizing version...
✔  hosting[<project-name>]: version finalized
i  hosting[<project-name>]: releasing new version...
✔  hosting[<project-name>]: release complete

Any help would be appreciated