Glium: Why is quitting so slow?

help
1

I wrote some Rust + Glium code, following along with the examples. Closing the window takes well over a second, and I'm not sure why. Here's the minimal repro code, which strips away any actual graphics calls:

​#[macro_use]
extern crate glium;
extern crate image;

use glium::{glutin, Surface};
use glium::index::PrimitiveType;

fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let window = glutin::WindowBuilder::new();
    let context = glutin::ContextBuilder::new();
    let display = glium::Display::new(window, context, &events_loop).unwrap();

    let mut closed = false;

    while !closed {
        events_loop.poll_events(|event| {
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => {
                        closed = true;
                        println!("Close");
                    },
                    _ => ()
                },
                _ => (),
            }
        });
    }
}

There's a big delay between the "Close" print, and the window actually closing. Any ideas on how I can eliminate this slowdown? The slowdown prominently exists in release mode too.

2

What platform are you testing on? On my Linux laptop running X11 with the nvidia driver, there is no perceptible delay when closing the window.

3

I'm on Win10 with an AMD discrete GPU with proper drivers installed. Additionally, the example code on the glutin readme doesn't seem to have any such delays.