10,000 Textbox in Scroll is completely unresponsive to scrolling with mouse wheel/trackpad

use druid::widget::{Flex, TextBox};
use druid::{AppLauncher, Widget, WidgetExt, WindowDesc};

pub fn main() {
    let window = WindowDesc::new(build_widget());
    AppLauncher::with_window(window)
        .log_to_console()
        .launch("".to_string())
        .expect("launch failed");
}

fn build_widget() -> impl Widget<String> {
    let mut col = Flex::column();
    for _ in 0..10000 {
        col.add_child(TextBox::new());
    }
    col.scroll().vertical()
}

Run the provided Rust example starting at main and build_widget, which constructs a scrollable column of 10,000 TextBox widgets. Inspect the scroll and TextBox event handling involved in this widget tree. Done means mouse-wheel and trackpad scrolling is responsive with the reproduced example.