[AlexanderKaran]

Ok as this one is using Lighthouse, I think we can add this as it's very interesting:

• Uses Lighouse Resource Summary to measure KB downloaded: https://developer.chrome.com/docs/lighthouse/performance/resource-summary
• No charts or tables yet this is just the code to make the test run, results will happen in the next run and then will do a follow up PR
• Was a lot of code that could be shared with the other SSR Lighthouse test

I decided to use a simple HTML and CSS page rather than reuse one we had. They share the CSS as well, so it's the same. No router links; only external links. I also only run these tests once (no iterations and keeping mean, min, extra) I ran it locally several times and all tests stayed the same apart from one time Next.JS shifted by 1kb. We SSR a page on demand just like the SSR Lighthouse test no static generation. I think doing a static generation one as a comparison would be good though

A rough graph I shoved in after running locally:

Closes #705

Update

Ok so to ensure this test is fair I nuked all other test routes in the app-* package and ran again locally there was some reduction

Framework	Original KB	Only initial-load KB	Reduction
Astro	3.36	3.36	0 KB
Next.js	144.76	144.10	0.66 KB
Nuxt	211.72	205.56	6.16 KB
Pracht	21.95	21.51	0.44 KB
React Router	121.82	120.34	1.48 KB
SolidStart	110.86	63.14	47.72 KB
SvelteKit	39.24	35.73	3.51 KB
TanStack Start	354.82	347.21	7.62 KB

So this raises the question: do we change this test?:

• Keep the test as is, as a real app has many routes
• For this test, copy the app-* project, nuke the other routes and run the test
• Do both and show the difference

Starting to make me wonder what effect this could have on other tests; as you scale routes in the app, it can affect things based on the outcome of this test. However at the end of the day each app- project has the same routes so it is fair

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