Next.js web vitals

These are documented at nextjs.org/docs/advanced-features/measuring-performance. To enable them use NEXT_PUBLIC_OURBIGBOOK_LOG_PERF, the front-end-avaible version of OURBIGBOOK_LOG_PERF:

NEXT_PUBLIC_OURBIGBOOK_LOG_PERF=1 npm run dev

If enabled, we see a few metrics printed on the browser console such as:

{
    "id": "1667591558646-5510113745482",
    "name": "TTFB",
    "startTime": 0,
    "value": 2474.199999999255,
    "label": "web-vital"
}
{
    "id": "1667591558646-9119282792899",
    "name": "LCP",
    "startTime": 4982.099,
    "value": 4982.099,
    "label": "web-vital"
}

 Ancestors (4)

OurBigBook Web performance benchmarking
OurBigBook Web development
OurBigBook Web
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