Improving Load Times in Next.js

I've made an interesting observation: when I execute the npm run dev command to start the code, the initial page load takes much longer compared to subsequent page refreshes.

Upon inspecting the network tab in Chrome DevTools, I discovered that the first load is four times slower than the second one.

Initial Load https://i.sstatic.net/GSlPa.png

Subsequent Load https://i.sstatic.net/0jCG4.png

What could be causing this discrepancy? And are there any strategies to improve the loading speed?

Thank you in advance!

Answer №1

Next.js implements lazy compilation in development mode: only compiling code when the first request hits the endpoint. Subsequent requests are then served by the compiled code. Check out this link for more information.

However, in production mode, all resources need to be compiled upfront using next build for optimal performance. Experience it firsthand by following this guide: Learn more here.

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