There's a mistake in the event loop code in the mdbook

[NoamDev]

glium/examples/tutorial-10.rs

Lines 57 to 76 in 60889a2

	let next_frame_time = std::time::Instant::now() +
	std::time::Duration::from_nanos(16_666_667);
	*control_flow = glutin::event_loop::ControlFlow::WaitUntil(next_frame_time);
	match event {
	glutin::event::Event::WindowEvent { event, .. } => match event {
	glutin::event::WindowEvent::CloseRequested => {
	*control_flow = glutin::event_loop::ControlFlow::Exit;
	return;
	},
	_ => return,
	},
	glutin::event::Event::NewEvents(cause) => match cause {
	glutin::event::StartCause::ResumeTimeReached { .. } => (),
	glutin::event::StartCause::Init => (),
	_ => return,
	},
	_ => return,
	}

The wait until is reset before checking the event, so in case there was some event before the resume event (usually), the next frame is postponed by 1/60 seconds again and again.

It is possible this mistake is present in other chapters of the mdbook, I do not know.

[est31]

Good point! Further analysis of the issue and a PR are welcome :). Also don't forget keeping the mdbook itself up to date.