75 performance score of Next.js 14.1

[imran-baitham]

Can someone tell me why the performance score of Next.js 14.1's new release is only 75, and how can I improve it while using the app router?

I've tried a lot to improve the performance speed, but I was unsuccessful in doing so.

[DevDaniloFerrari]

Just try to build your application, run in production mode and do the performance analysis again.

To do this, run these commands:

npm run build
npm start

here is my application running in development mode

here is my application running in production mode

[imran-baitham]

@DevDaniloFerrari Oh, I hadn't thought of that. Thank you for your help.

[DevDaniloFerrari]

You're welcome! :)

[Rashid-Aly]

@imran-baitham Simple run these commands:

npm run build
npm start

[markoleavy]

It doesn't make much sense to me to use lighthouse with localhost, nor in dev or build/start mode.