Show lowest revalidation times of Full Route Cache per route on next build output

[xava-dev]

Goals

Visualize the Full Route Cache revalidation time (in seconds) per route

Non-Goals

No response

Background

The revalidation time of a route is known.
However, when developing it is quite hard and very time-consuming to exactly know what the revalidation time of a route is. As you have to dig through every request that is happening across each layout and page of a single route.

As stated in the documentation:

• "The lowest revalidate across each layout and page of a single route will determine the revalidation frequency of the entire route. This ensures that child pages are revalidated as frequently as their parent layouts."
• "Individual fetch requests can set a lower revalidate than the route's default revalidate to increase the revalidation frequency of the entire route. This allows you to dynamically opt-in to more frequent revalidation for certain routes based on some criteria."
  https://nextjs.org/docs/app/api-reference/file-conventions/route-segment-config#revalidation-frequency

Proposal

It would be very pleasing to see the revalidation time in seconds per route on the build output of next build.
This could go in a seperate column Revalidate (s), just like the Size and First Load JS columns.