gdk.FrameClock internally keeps a history of gdk.FrameTimings objects for recent frames that can be retrieved with Frame.clockGetTimings. The set of stored frames is the set from the counter values given by Frame.clockGetHistoryStart and Frame.clockGetFrameCounter, inclusive.
the frame counter value for the oldest frame that is available in the internal frame history of the gdk.FrameClock
3.8
gdk.FrameClock internally keeps a history of gdk.FrameTimings objects for recent frames that can be retrieved with Frame.clockGetTimings. The set of stored frames is the set from the counter values given by Frame.clockGetHistoryStart and Frame.clockGetFrameCounter, inclusive.