Performance Metrics · AuditJet Glossary
TTI (Time to Interactive)
The time until a page is visually rendered and capable of reliably responding to user input — the main thread has been idle for at least 5 seconds with no long tasks.
TTI marks when a page transitions from visually loaded to fully interactive. A page may look loaded (FCP done, LCP done) but still be unresponsive if JavaScript is still executing. Google has de-emphasised TTI in favour of INP as the interactivity metric, but TTI remains a useful diagnostic for understanding the JavaScript execution phase.
Related terms
A Core Web Vital that assesses overall responsiveness by observing the latency of all qualifying interactions throughout the entire page lifecycle and reporting the worst-case value.
The total time between First Contentful Paint and Time to Interactive during which the main thread was blocked for long enough to prevent input responsiveness.
A JavaScript task that takes longer than 50ms to complete and blocks the browser's main thread, preventing user interaction.
The time from page navigation start until any text, image, non-white canvas, or SVG is first rendered on the page.
Monitor TTI continuously
AuditJet tracks Core Web Vitals on a schedule with revenue impact alerts.
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