Overview
- Google disclosed on July 23, 2026 that a multi-year engineering effort reduced the frequency of janky scrolls in Chrome on Android by 48% between 2023 and 2026.
- The team instrumented the full input-to-frame pipeline with Perfetto traces and built automated heuristics to find the small delays that accumulate into visible stutter.
- Targeted projects such as Input Vizard, Input Framer, input prediction, Direct2Thread and moving browser controls into the GPU compositor changed how touch events flow and how frames are produced.
- Engineers worked with Android to reroute input and raise the priority of input-delivery threads so touch events reach Chrome more reliably and on time.
- Changes were tested with A/B experiments and rolled out after proving they cut missed frame deadlines, and users should see smoother scrolling while engineers continue tracing-driven work to further reduce jank.