Martin Splitt Shares Some Info on rUM vs Lab Data for Performance Metrics

In this twitter thread Martin Splitt shares some info on how various Google properties looks at performance metrics: He talks about things like

• Googlebot renders with the Googlebot UA
• Google Search looks for a mix of lab data and real user metrics (rUM, e.g. the Chrome UX report) to determine performance signals.
• GSC web vitals report – it shows you limited CrUX (Chrome UX report) data
• etc

Here's my lenghty answer 🙂 Grab a seat, make yourself at home! Let's dissect this question into:

– Googlebot measuring things
– Dynamic rendering and performance
– Performance and UX
– rUM vs. lab data
– GSC Web Vitals report

Off we go!

— Martin Splitt @ ??? (@g33konaut) August 4, 2020