Time to Interactive (TTI)
TTI measures how long a page takes before a user can actually tap and interact reliably — a key mobile performance metric.
What it means
Time to Interactive is the point at which a page has loaded enough that taps, scrolls, and button presses respond reliably, not just when pixels appear. A page can look ready while the main thread is still busy and ignoring input — that gap is what TTI captures. On mobile iGaming, a TTI under three seconds is the rough line between a player who plays and one who bounces.
Why it matters for operators
Most iGaming traffic is mobile, often on mid-range phones and patchy networks, so slow TTI directly costs deposits and retention. It's shaped by JavaScript weight, third-party scripts, and how much work the device does before the lobby responds. Tuning it is a core part of a mobile-first build and sits alongside Google's Core Web Vitals as a metric worth tracking per release.
Example
Two casinos with identical games but a one-second TTI gap will see measurably different bounce and conversion rates, because the slower lobby feels broken on the first tap.