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Common questions
Site speed and Core Web Vitals questions, answered.
Hosting. Shared plans put dozens or hundreds of sites on one server, and during traffic spikes the Time to First Byte (TTFB) can bloat from 200ms to 2+ seconds. If your TTFB stays over 400ms even with caching turned on, the server is the bottleneck. Missing or misconfigured caching and unoptimized images come next on the list. See all 11 causes and their fixes.
Phones have slower CPUs, weaker networks and less memory, so every inefficiency costs more there. Mobile LCP fails when a slow server, render-blocking files and a heavy hero image stack up, and mobile INP fails when JavaScript ties up the main thread. Mobile is also the version Google indexes and ranks. Only 48.7% of WordPress sites passed all three metrics on mobile in August 2026. See the fix for each metric.
Measure before you change anything. WebPageTest and GTmetrix show a waterfall of every request, PageSpeed Insights gives Core Web Vitals field and lab data, and the free Query Monitor plugin profiles database queries. TTFB tells you whether the server is the problem, and render-blocking files show up in the request timeline. Fix the biggest bottleneck first. Get a free speed audit if you want us to read the data.
About a month. PageSpeed Insights shows two datasets: lab data, which reacts to fixes right away, and field data from real Chrome users over 28 days, which lags behind. Google judges your site by the field data, so wait for it before calling a fix done. The Core Web Vitals report in Search Console shows which URL groups still fail across the site. See how to verify each fix.
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