Window flickering during resize about alacritty HOT 3 OPEN

Is example from https://github.com/rust-windowing/winit flickers? Also, is example from github.com/rust-windowing/glutin/ flickers?

from alacritty.

No, they don't. The problem seems to be related to glutin, but the glutin example has vsync enabled and also renders in AboutToWait.

If I change the glutin example such that vsync is disabled and if I move the render call to RedrawRequested, it flickers exactly like alacritty does.

from alacritty.

I feel like it's a macOS sync issue or something like that. Because the RedrawRequested is essentially a drawRect during resize, well, more or less, so if it flickers it could be some sync issue on apple side?

And with e.g. AboutToWait it's when events are cleared, thus it likely stretches the content because the resize is not issued at the drawRect, but then we submit the right buffer so it looks ok-ish.

from alacritty.