that is available in the internal frame history of the [gdk.frame_clock.FrameClock]
FrameClock.getHistoryStart
long getHistoryStart()Returns the frame counter for the oldest frame available in history.
[gdk.frame_clock.FrameClock] internally keeps a history of [gdk.frame_timings.FrameTimings] objects for recent frames that can be retrieved with [gdk.frame_clock.FrameClock.getTimings]. The set of stored frames is the set from the counter values given by [gdk.frame_clock.FrameClock.getHistoryStart] and [gdk.frame_clock.FrameClock.getFrameCounter], inclusive.
Returns
the frame counter value for the oldest frame