SDK taking too long to scan a page

[caiquemartins]

Hi! The project seems amazing, thanks for that.

I'm trying to use the sdk and it's ok, it works. Create a very simple using the HelloWorld and Twain samples. But why in my code code it takes so long to scan? I can't find what I'm missing here. It got me confused mostly because the NAPS2 app it is so fast to get the pages from the same emulator.

I'm using the Twain Freeimage emulator for tests.

using var scanningContext = new ScanningContext(new GdiImageContext());

scanningContext.SetUpWin32Worker();

var controller = new ScanController(scanningContext);

var devices = await controller.GetDeviceList(Driver.Twain);

foreach (var device in devices)
    Console.WriteLine($"{devices.IndexOf(device)} - {device.ID}: {device.Name}");

Console.Write($"Type scanner: ");
var input = Console.ReadLine();

var id = int.Parse(input!);

ScanDevice scanDevice = devices[id];
var options = new ScanOptions { Device = scanDevice, UseNativeUI = true};

List<ProcessedImage> images = new List<ProcessedImage>();

var watch = System.Diagnostics.Stopwatch.StartNew();
watch.Start();

await foreach (var image in controller.Scan(options))
{
    watch.Stop();
    Console.WriteLine($"Page scanned in {watch.Elapsed}");
    images.Add(image);
    watch.Restart();
}

Console.WriteLine($"Scanned {images.Count} pages!");