Google reduced Chrome for Android scroll jank by 48% - 9to5Google

What the report says

9to5Google reported that Google says it has cut “scroll jank” in Chrome for Android by 48% from 2023 to 2026, citing details the company shared on July 23. The term describes the visible stutter or jump that happens when a page does not show an updated scroll position in time for the display’s next refresh. Google framed the issue as a major obstacle to a smooth mobile web experience.

According to the report, Chrome must deliver each visual frame before the screen refreshes, with a missed deadline causing the display to keep showing an older scroll position for another cycle. On a 60 Hz screen, that cycle is about 16.7 milliseconds. The challenge is more complicated in Chrome than in many Android apps because scrolling work moves through several processes, including browser, renderer and GPU components, which help with stability and security but add coordination costs.

The article highlighted several changes Google made to reduce delays and uneven timing. One is input prediction, where Chrome can generate an estimated scroll update if operating system input arrives too late. Another shifts handling of browser controls into the Viz/GPU pipeline so the address bar and page movement can stay synchronized with less dependence on the browser main thread. Google also worked with Android to raise the priority of threads that deliver hardware input to Chrome.

The development matters because small delays during scrolling can make webpages feel less responsive, especially on mobile devices where touch input is constant. The reported improvement suggests Google is targeting not only page loading speed but also the perceived smoothness of everyday browsing in Chrome for Android.