Winit: [MacOS] Continuous events like MouseMotion and MouseWheel seem laggy in 0.20
before 0.20 (pseudocode):
// smooth
loop {
ev.poll_events(|e| {
match e {
DeviceEvent::MouseMotion => {
// deal with mouse movement
}
}
});
update();
render();
}
after 0.20:
// laggy
ev.run(move |e, flow| {
match e {
DeviceEvent::MouseMotion => {
// deal with mouse movement
},
RedrawRequested => {
update();
render();
}
MainEventsCleared => {
window.request_redraw();
}
}
})
Not sure if it's me not setting up correctly. It's pretty obvious in my 3d first person camera example, the example is running at >60fps, movement with keyboard is smooth, but the camera movement which responds to mousemove looks like 20 fps. I have 2 binaries for comparison between 2 versions (I'm using glutin not winit directly, so glutin 0.22 vs glutin 0.21): mousemove_lag_test.zip.
slmjkdbtl
All 13 comments
I am experiencing a similar issue where the mouse events lag behind the cursor, and there is a large amount of lag when you click and hold.
Here's a Gist with a demo: https://gist.github.com/egauderman/e0e3958f9ac4508f4a0e5839107fbd5a
egauderman
on 26 Jan 2020
I鈥檝e been seeing this too for a while. I had some notes on it here:
aclysma
on 29 Jan 2020
👍1
I'm curious if it's possible to investigate the similarities/differences between winit and Reprocessing uses for window events, as I used Reprocessing in the past for graphics programming and it didn't have this mouse lag issue (on the same device).
egauderman
on 1 Feb 2020
@egauderman Or just compare changes between 0.20 and 0.19? I didn't have the problem with 0.19, this looks like a problem related to the eventloop refactor
slmjkdbtl
on 1 Feb 2020
👍1
I spent a good amount of time trying to figure this out tonight. The lag is pretty conspicuous when printing out all events. Here's what it looks like just dragging the mouse:
Smoothly moving the mouse
wakeup
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7875 NewEvents(Poll)
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-1.0, 0.0) } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1268.15625, y: 444.6015625 }, modifiers: (empty) } })
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (0.0, 1.0) } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1267.6640625, y: 445.0859375 }, modifiers: (empty) } })
cleared
ready!
take events
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7875 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -1.0 } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7875 DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-1.0, 0.0) } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7875 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1268.15625, y: 444.6015625 }, modifiers: (empty) } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7875 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7875 DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (0.0, 1.0) } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7875 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1267.6640625, y: 445.0859375 }, modifiers: (empty) } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7875 MainEventsCleared
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7875 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7892 RedrawEventsCleared
wakeup
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7892 NewEvents(Poll)
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-1.0, 1.0) } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1266.1875, y: 447.0234375 }, modifiers: (empty) } })
cleared
ready!
take events
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7892 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -1.0 } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7892 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7892 DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-1.0, 1.0) } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7892 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1266.1875, y: 447.0234375 }, modifiers: (empty) } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7893 MainEventsCleared
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7893 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7921 RedrawEventsCleared
wakeup
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7921 NewEvents(Poll)
cleared
ready!
take events
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7921 MainEventsCleared
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7921 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7939 RedrawEventsCleared
wakeup
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7939 NewEvents(Poll)
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-1.0, 1.0) } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1262.7421875, y: 450.4140625 }, modifiers: (empty) } })
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-1.0, 1.0) } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1260.7734375, y: 452.8359375 }, modifiers: (empty) } })
cleared
ready!
take events
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7939 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -1.0 } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7939 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7939 DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-1.0, 1.0) } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7939 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1262.7421875, y: 450.4140625 }, modifiers: (empty) } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7939 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -1.0 } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7939 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7940 DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-1.0, 1.0) } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7940 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1260.7734375, y: 452.8359375 }, modifiers: (empty) } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7940 MainEventsCleared
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7940 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7955 RedrawEventsCleared
wakeup
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7955 NewEvents(Poll)
cleared
ready!
take events
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7956 MainEventsCleared
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7956 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7971 RedrawEventsCleared
wakeup
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7971 NewEvents(Poll)
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -2.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 2.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-2.0, 2.0) } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1256.8359375, y: 456.2265625 }, modifiers: (empty) } })
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -2.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-2.0, 1.0) } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1252.8984375, y: 458.6484375 }, modifiers: (empty) } })
cleared
ready!
take events
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7972 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -2.0 } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7972 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 2.0 } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7972 DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-2.0, 2.0) } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7972 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1256.8359375, y: 456.2265625 }, modifiers: (empty) } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7972 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -2.0 } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7972 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7972 DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-2.0, 1.0) } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7972 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1252.8984375, y: 458.6484375 }, modifiers: (empty) } }
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7972 MainEventsCleared
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7972 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:40Z WARN skulpin::app::app] EVENT AT 7977 RedrawEventsCleared
wakeup
Smoothly move the mouse but add a left click while moving the mouse
But throw in clicking the mouse while being careful to keep the mouse moving:
wakeup
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8194 NewEvents(Poll)
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-1.0, 1.0) } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1231.15625, y: 478.9921875 }, modifiers: (empty) } })
cleared
ready!
take events
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8195 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -1.0 } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8195 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8195 DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-1.0, 1.0) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8195 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1231.15625, y: 478.9921875 }, modifiers: (empty) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8195 MainEventsCleared
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8195 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8213 RedrawEventsCleared
wakeup
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8213 NewEvents(Poll)
cleared
ready!
take events
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8214 MainEventsCleared
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8214 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8227 RedrawEventsCleared
wakeup
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8227 NewEvents(Poll)
cleared
ready!
take events
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8227 MainEventsCleared
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8227 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8245 RedrawEventsCleared
wakeup
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8245 NewEvents(Poll)
cleared
ready!
take events
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8246 MainEventsCleared
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8246 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8260 RedrawEventsCleared
wakeup
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8260 NewEvents(Poll)
cleared
ready!
take events
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8260 MainEventsCleared
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8261 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8280 RedrawEventsCleared
wakeup
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8280 NewEvents(Poll)
cleared
ready!
take events
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8280 MainEventsCleared
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8280 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8292 RedrawEventsCleared
wakeup
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8292 NewEvents(Poll)
cleared
ready!
take events
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8292 MainEventsCleared
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8292 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8309 RedrawEventsCleared
wakeup
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8309 NewEvents(Poll)
cleared
ready!
take events
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8309 MainEventsCleared
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8309 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8325 RedrawEventsCleared
wakeup
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8325 NewEvents(Poll)
cleared
ready!
take events
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8325 MainEventsCleared
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8325 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8342 RedrawEventsCleared
wakeup
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8342 NewEvents(Poll)
push back event [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Button { button: 0, state: Pressed } })]
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Button { button: 0, state: Pressed } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: MouseInput { device_id: DeviceId(DeviceId), state: Pressed, button: Left, modifiers: (empty) } })
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 2.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-1.0, 2.0) } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1228.203125, y: 483.3515625 }, modifiers: (empty) } })
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Button { button: 0, state: Released } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: MouseInput { device_id: DeviceId(DeviceId), state: Released, button: Left, modifiers: (empty) } })
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -19.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 13.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-19.0, 13.0) } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1191.671875, y: 508.3359375 }, modifiers: (empty) } })
cleared
ready!
take events
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8343 DeviceEvent { device_id: DeviceId(DeviceId), event: Button { button: 0, state: Pressed } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8343 WindowEvent { window_id: WindowId(Id(140268456159024)), event: MouseInput { device_id: DeviceId(DeviceId), state: Pressed, button: Left, modifiers: (empty) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8343 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -1.0 } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8343 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 2.0 } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8343 DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-1.0, 2.0) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8343 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1228.203125, y: 483.3515625 }, modifiers: (empty) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8343 DeviceEvent { device_id: DeviceId(DeviceId), event: Button { button: 0, state: Released } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8343 WindowEvent { window_id: WindowId(Id(140268456159024)), event: MouseInput { device_id: DeviceId(DeviceId), state: Released, button: Left, modifiers: (empty) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8343 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -19.0 } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8343 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 13.0 } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8343 DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-19.0, 13.0) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8343 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1191.671875, y: 508.3359375 }, modifiers: (empty) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8343 MainEventsCleared
app received mouse down
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8343 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8359 RedrawEventsCleared
wakeup
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8359 NewEvents(Poll)
cleared
ready!
take events
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8359 MainEventsCleared
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8359 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8377 RedrawEventsCleared
wakeup
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8377 NewEvents(Poll)
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-1.0, 1.0) } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1188.71875, y: 510.2734375 }, modifiers: (empty) } })
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -2.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-2.0, 1.0) } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1184.6953125, y: 512.6953125 }, modifiers: (empty) } })
queue events []
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1184.6953125, y: 513.1796875 }, modifiers: (empty) } })
cleared
ready!
take events
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8378 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -1.0 } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8378 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8378 DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-1.0, 1.0) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8378 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1188.71875, y: 510.2734375 }, modifiers: (empty) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8378 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -2.0 } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8378 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8378 DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-2.0, 1.0) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8378 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1184.6953125, y: 512.6953125 }, modifiers: (empty) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8378 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1184.6953125, y: 513.1796875 }, modifiers: (empty) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8378 MainEventsCleared
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8378 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8396 RedrawEventsCleared
wakeup
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8396 NewEvents(Poll)
cleared
ready!
take events
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8396 MainEventsCleared
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8396 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8417 RedrawEventsCleared
wakeup
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8417 NewEvents(Poll)
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -2.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-2.0, 1.0) } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1181.25, y: 515.6015625 }, modifiers: (empty) } })
queue events [StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -2.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 2.0 } }), StaticEvent(DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-2.0, 2.0) } })]
queue event StaticEvent(WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1176.8203125, y: 518.9921875 }, modifiers: (empty) } })
cleared
ready!
take events
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8418 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -2.0 } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8418 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 1.0 } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8418 DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-2.0, 1.0) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8418 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1181.25, y: 515.6015625 }, modifiers: (empty) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8418 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 0, value: -2.0 } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8418 DeviceEvent { device_id: DeviceId(DeviceId), event: Motion { axis: 1, value: 2.0 } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8418 DeviceEvent { device_id: DeviceId(DeviceId), event: MouseMotion { delta: (-2.0, 2.0) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8418 WindowEvent { window_id: WindowId(Id(140268456159024)), event: CursorMoved { device_id: DeviceId(DeviceId), position: PhysicalPosition { x: 1176.8203125, y: 518.9921875 }, modifiers: (empty) } }
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8418 MainEventsCleared
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8418 RedrawRequested(WindowId(Id(140268456159024)))
[2020-02-08T09:32:41Z WARN skulpin::app::app] EVENT AT 8438 RedrawEventsCleared
wakeup
It looks to me like, when clicking, events stop being emitted for about 100ms.
It looks to me like something isn't right with the delivery of events from NSApplication to the registered callback, which makes me suspect something is wrong with the setup for NSApplication or CFRunLoop. But I'm not familiar enough with the platform to know for certain.
aclysma
on 8 Feb 2020
My guess is that this started along with this overhaul commit: https://github.com/rust-windowing/winit/commit/d5391686ae98914ba54e30d872d0e42b5ab5800c (I didn't verify this, but it's a huge change and fundamentally changes how events are handled on macOS, so I think it's a good possibility)
Before it looks like events were continuously polled by calling appkit::NSApp().nextEventMatchingMask_untilDate_inMode_dequeue_
Now it relies on receiving callbacks from NSApplication, which calls an extern "C" fn send_event which in turn calls maybe_dispatch_device_event(this, event);
aclysma
on 9 Feb 2020
👍2
Not sure if this is helpful but I checked the Reason Reprocessing library (which in my experience handles mac touchpad input smoothly as I mentioned in my earlier comment) and found that it depends on SDL and internally it calls SDL_PollEvent. Not sure if this is helpful but putting it out there for reference.
(i.e. Reprocessing depends on Reasongl which depends on a fork of TSDL which is a wrapper around SDL, and specifically SDL_PollEvent (appears as "poll_event" in the Reason code) is what kicks off the mouse move events)
egauderman
on 13 Feb 2020
With the disclaimer that I've never written a line of objective C in my life, and that I have no experience working on macOS, I think this is where SDL does their event handling: https://github.com/spurious/SDL-mirror/blob/6b6170caf69b4189c9a9d14fca96e97f09bbcc41/src/video/cocoa/SDL_cocoaevents.m
There is a line here:
NSEvent *event = [NSApp nextEventMatchingMask:NSEventMaskAny untilDate:[NSDate distantPast] inMode:NSDefaultRunLoopMode dequeue:YES ];
Looking at the 0.19 winit code there was something similar with the comment "Wait for the next event. Note that this function blocks during resize."
// Wait for the next event. Note that this function blocks during resize.
let ns_event = appkit::NSApp().nextEventMatchingMask_untilDate_inMode_dequeue_(
NSEventMask::NSAnyEventMask.bits() | NSEventMask::NSEventMaskPressure.bits(),
foundation::NSDate::distantFuture(cocoa::base::nil),
foundation::NSDefaultRunLoopMode,
cocoa::base::YES);
The second undtilDate was distantFuture in the rust implementation, perhaps if that were distantPast like in SDL, it wouldn't block.
So maybe manually pumping these events is still an option? (Assuming the only reason for changing the way this was handled before was to avoid blocking.)
Also of note, SDL also has this call [NSApp sendEvent:event]; Not sure if that does anything we'd want to do too.
aclysma
on 14 Feb 2020
👍1
Using ControlFlow::Poll, performing sleeping manually in MainEventCleared we see a pattern where the MainEventCleared occurs in pairs without any intervening motion events:
Generating mouse event: (8.000, 0.000)
Generating mouse event: (19.000, -5.000)
[DeviceEvent::MouseMotion(8.000, 0.000)] @ 0.193 us, 342.641 us after winit created
[DeviceEvent::MouseMotion(19.000, -5.000)] @ 41.391 us, 178.440 us after winit created
[MainEventCleared] @ 50.862 us
[MainEventCleared] @ 34315.527 us
Generating mouse event: (42.000, -8.000)
Generating mouse event: (83.000, -16.000)
[DeviceEvent::MouseMotion(42.000, -8.000)] @ 70504.492 us, 319.739 us after winit created
[DeviceEvent::MouseMotion(83.000, -16.000)] @ 70528.703 us, 153.272 us after winit created
[MainEventCleared] @ 70541.742 us
[MainEventCleared] @ 106441.617 us
Generating mouse event: (80.000, -11.000)
Generating mouse event: (133.000, -14.000)
[DeviceEvent::MouseMotion(80.000, -11.000)] @ 141973.828 us, 366.537 us after winit created
[DeviceEvent::MouseMotion(133.000, -14.000)] @ 141990.969 us, 123.327 us after winit created
[MainEventCleared] @ 141999.312 us
[MainEventCleared] @ 177216.766 us
Generating mouse event: (110.000, -10.000)
Generating mouse event: (189.000, -2.000)
[DeviceEvent::MouseMotion(110.000, -10.000)] @ 213950.781 us, 390.369 us after winit created
[DeviceEvent::MouseMotion(189.000, -2.000)] @ 213971.625 us, 131.365 us after winit created
[MainEventCleared] @ 213983.016 us
[MainEventCleared] @ 249157.875 us
Generating mouse event: (201.000, -4.000)
Generating mouse event: (316.000, -15.000)
[DeviceEvent::MouseMotion(201.000, -4.000)] @ 285859.250 us, 464.474 us after winit created
[DeviceEvent::MouseMotion(316.000, -15.000)] @ 285882.094 us, 134.143 us after winit created
[MainEventCleared] @ 285893.969 us
[MainEventCleared] @ 321141.406 us
Generating mouse event: (311.000, -13.000)
Generating mouse event: (192.000, -14.000)
[DeviceEvent::MouseMotion(311.000, -13.000)] @ 359207.062 us, 532.341 us after winit created
[DeviceEvent::MouseMotion(192.000, -14.000)] @ 359241.375 us, 186.857 us after winit created
[MainEventCleared] @ 359253.594 us
Imberflur
on 10 Mar 2020
Polling twice appears to workaround this issue (ie only running update code, sleeping, etc every other MainEventCleared)
Imberflur
on 10 Mar 2020
@Imberflur That's a valid workaround for now, thanks!
slmjkdbtl
on 10 Mar 2020
😄1
Just chiming in that I am seeing noticeable lag on Windows 10 (nvidia and intel integrated gpus).
photex
on 28 Jun 2020
In my case at least, I ran my app with Tracy and discovered that due to driver differences between each machine, the time to get the next swapchain texture was "fixed" on one machine to 16ms, but totally unbounded on another. As a result, what I thought was lag was actually just a bug in my handling of input events which causes them to be framerate dependent.
My apologies!
photex
on 29 Jun 2020
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Most helpful comment
My guess is that this started along with this overhaul commit: https://github.com/rust-windowing/winit/commit/d5391686ae98914ba54e30d872d0e42b5ab5800c (I didn't verify this, but it's a huge change and fundamentally changes how events are handled on macOS, so I think it's a good possibility)
Before it looks like events were continuously polled by calling appkit::NSApp().nextEventMatchingMask_untilDate_inMode_dequeue_
Now it relies on receiving callbacks from NSApplication, which calls an
extern "C" fn send_eventwhich in turn callsmaybe_dispatch_device_event(this, event);