A gdk:frame-timings structure holds timing information for a single frame of the application’s displays. The gdk:frame-timings structure is opaque, and has no user visible fields. An instance cannot be created from the Lisp side. To retrieve a gdk:frame-timings instance, use the gdk:frame-clock-timings or gdk:frame-clock-current-timings functions. The information in the gdk:frame-timings instance is useful for precise synchronization of video with the event or audio streams, and for measuring quality metrics for the application’s display, such as latency and jitter.