I have to create andoid app with maui .net 9.0 and I have to use old tablet with cpu 32bit.

Tablet details: 2018, Android Version 10, API 29, Java VM ART 2.1.0, Kernel architecture armv8l, armeabi-7a/armeabi.
I have installed Camera.MAUI.ZXing to read a barcode.
In the app, I display the barcode read if the barcode reader reads the same value at least twice, even if they're not consecutive.
The problem is that often nothing is displayed, or if a barcode is displayed, it takes a long time, but I can't wait that long, so I need to read the barcode faster.
On a newer generation Android phone, reading is fast and consistent.
I would like to use these tablets even if they are quite old.
I attached camera's info.

This is the code:

using System.Diagnostics;
using ZXing;

namespace GestMagazzino;

public partial class CameraView : ContentPage
{
    bool isHandlingResult = false;

    string _lastValue;
    int _sameCount;

    Dictionary _readCounts = new();
    DateTime _windowStart = DateTime.MinValue;

    const int REQUIRED_MATCHES = 2;
    const int WINDOW_MS = 1500;
    bool _accepted;

    public CameraView()
    {
        InitializeComponent();

        barcodeReader.Options = new ZXing.Net.Maui.BarcodeReaderOptions
        {
            Formats = ZXing.Net.Maui.BarcodeFormat.Code128 | ZXing.Net.Maui.BarcodeFormat.QrCode | ZXing.Net.Maui.BarcodeFormat.Ean13 | ZXing.Net.Maui.BarcodeFormat.Ean8 |
                    ZXing.Net.Maui.BarcodeFormat.Code39,
            AutoRotate = true,
            Multiple = false        
        };

        if(Global.typeCode == enTypeCode.barcode)
        {
            gridInquadratura.WidthRequest = 300;
            gridInquadratura.HeightRequest = 150;
            borderInquadratura.WidthRequest = 300;
            borderInquadratura.HeightRequest = 150;
        }
    }

    protected override void OnAppearing()
    {
        base.OnAppearing();
        barcodeReader.IsDetecting = true;

        _accepted = false;
        _sameCount = 0;
        _lastValue = null;
    }

    protected override void OnDisappearing()
    {
        base.OnDisappearing();
        barcodeReader.IsDetecting = false;
    }

    private async void barcodeReader_BarcodesDetected(object sender, ZXing.Net.Maui.BarcodeDetectionEventArgs e)
    {
        try
        {
            if (_accepted)
                return;

            var now = DateTime.Now;

            if (_windowStart == DateTime.MinValue ||
                (now - _windowStart).TotalMilliseconds > WINDOW_MS)
            {
                _windowStart = now;
                _readCounts.Clear();
            }

            var result = e.Results
                .Where(r => !string.IsNullOrWhiteSpace(r.Value))
                .OrderByDescending(r => r.Value.Length)
                .FirstOrDefault();

            if (result == null)
                return;

            var value = result.Value;

            if (!_readCounts.ContainsKey(value))
                _readCounts[value] = 0;

            _readCounts[value]++;

            Debug.WriteLine($"Letto: {value} ({_readCounts[value]})");

            if (_readCounts[value] < REQUIRED_MATCHES)
                return;

            _accepted = true;

            MainThread.BeginInvokeOnMainThread(async () =>
            {
                try
                {
                    barcodeReader.IsDetecting = false;

                    resultLabel.Text = $"Codice: {value}";
                    Global.resultBarcode = value;

                    await Task.Delay(300);
                    await Navigation.PopAsync();
                }
                catch (Exception ex)
                {
                    await DisplayAlert("UI ERROR", ex.Message, "OK");
                }
            });

            
        }
        catch (Exception ex)
        {
            await App.Current.MainPage.DisplayAlert("ERROR CAMERA VIEW", ex.Message, "OK");
        }
       
    }
}