Rfd, uses 100% of one CPU core on Windows

[qarmin]

Project czkawka/krokiet uses the following dependency:

rfd = { version = "0.15", default-features = false, features = ["xdg-portal", "async-std"] }

rfd version "0.15.4"

rfd usage

        let file_dialog = FileDialog::new().set_directory(directory);

        let Some(folders) = file_dialog.pick_folders() else {
            return;
        };

One user reported that opening the file-chooser dialog on Windows causes a single CPU core to spike to 100%. After closing the dialog, CPU usage returns to normal.

Issue link: qarmin/czkawka#1641

Open krokiet and click "Add folder" button in lower left corner. Then the CPU usage will be high and the folder-picking dialog is very laggy.

After I close the dialog, CPU usage will go back down to 2%.

[PolyMeilex]

Can not reproduce:

fn main() {
    let path = std::env::current_dir().unwrap();

    let res = rfd::FileDialog::new()
        .set_directory(&path)
        .pick_folders();

    println!("The user choose: {:#?}", res);
}

Dialog is responsive, and uses barely any CPU.

[dtzxporter]

I can confirm something is weird here, it should idle at 0% when the dialog is open. I've also had users report taking forever to load folder items. I need to investigate, but may be a winit interaction as well.