TL;DR
Time to Interactive (TTI) is a lab metric that records the time, in seconds, from page load start until the page is visually rendered, event handlers are registered, and the main thread is free of long tasks for at least five seconds.
What is Time to Interactive (TTI)?
Time to Interactive (TTI) is a lab metric that records the time, in seconds, from page load start until the page is visually rendered, event handlers are registered, and the main thread is free of long tasks for at least five seconds.
Learn more in our how TTI fits into a performance audit guide, or work with us through our done-for-you speed optimization service.
How TTI is Measured
TTI is reported by Lighthouse from a performance trace.