TTI — Time to Interactive
TTI (Time to Interactive) measures how long it takes for the page to be fully interactive: main content is displayed, event listeners are at…
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TTI (Time to Interactive) measures how long it takes for the page to be fully interactive: main content is displayed, event listeners are attached and interactions respond in under 50 ms. It's not the same as "the page is loaded" — a page can be visible but unresponsive if heavy JavaScript is running in the background. Thresholds: < 3.8 s = excellent, 3.8–7.3 s = needs improvement, > 7.3 s = poor.
Real-world impact of "TTI — Time to Interactive"
A high TTI frustrates users: the page looks ready but clicks don't respond. It's often caused by too much JavaScript executed at startup. Reducing TTI can increase conversions by 30% according to Google studies.
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