Harry Roberts @csswizardry.com · Feb 20 💡 Here is a fascinating phenomenon on a current client’s site! I’ve talked a lot about latency lately, and—if the data is to be trusted—this client had a huge and sustained uptick in high-latency visitors since the middle of November. Its knock-on effect on (Core) Web Vitals is stark!
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What's that tool your using for the historic vitals data? Looks amazing!
Remember, CrUX’s RTT data has NOTHING to do with your site—it’s a characteristic of your visitors. Increased RTT is like having ‘more mobile traffic’ or ‘more visitors from Spain’. This site’s latency hasn’t increased, but the number of high-latency visits has.