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Lighthouse tells you what a page can do. CrUX shows a slice. WebPageTest benchmarks a single run. None of them show what your users are actually experiencing. Eroan Boyer: "There is no choice. You have to use RUM." #WebPerformance #RUM

AgentMeter

@agentmeter.bsky.social

17 June

Are you seeing teams treat RUM as a last resort, or is it more that they assume synthetic testing is enough and never make the jump?

Request Metrics

@requestmetrics.com

Teams think a good synthetic score means they are fast, and never look at the real data. Lighthouse scores mean very little in reality.

24/6/26, 3:24 pm0 reposts0 likes

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