该问题很可能是由组件在每次更新后重新绘制自身引起的。
这通常可以通过在您进行更改时告诉Form暂停视觉更新来加速，如下所示：

this.SuspendLayout();
// Do your updates here
this.ResumeLayout();

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它应该在this等于Form的地方运行。或者如果你更喜欢在其他地方运行它，那么你需要将Form作为参数传递给那个方法，并在那里调用Suspend...+Resume...。

对于像ListView和DataGridView这样承载大量项目的控件，提高性能的一种方法是使用VirtualMode=true将底层列表项目的更改与UI绘制解耦。由此推论，如果您想要编写一个函数来获取需要检查的项目列表，则根本不需要接触UI，并且应该很快。

public partial class MainForm : Form
{
    public MainForm() => InitializeComponent();
    protected override void OnLoad(EventArgs e)
    {
        base.OnLoad(e);
        for (int i = 1; i <= 3000; i++)
        {
            SecuritiesList.Add(new Security { Text = $"Security {i}", IsChecked = false });
        }
        m_lsvSecurities.View = View.Details;
        m_lsvSecurities.HeaderStyle = ColumnHeaderStyle.None;
        m_lsvSecurities.Columns.Add("", 80);
        m_lsvSecurities.Columns.Add("Security", 300);
        m_lsvSecurities.CheckBoxes = true;
        m_lsvSecurities.VirtualMode = true;
        m_lsvSecurities.RetrieveVirtualItem += (sender, e) =>
        {
            if (e.ItemIndex >= 0 && e.ItemIndex < SecuritiesList.Count)
            {
                var security = SecuritiesList[e.ItemIndex];
                ListViewItem item = new ListViewItem(text: security.IsChecked ? "\u2612" : "\u2610");
                item.SubItems.Add(security.Text);
                e.Item = item;
            }
            else
            {
                e.Item = new ListViewItem();
            }
        };
        m_lsvSecurities.MouseClick += (sender, e) =>
        {
            var hti = m_lsvSecurities.HitTest(e.Location);
            if (hti.Location == ListViewHitTestLocations.Label)
            {
                var security = SecuritiesList[hti.Item.Index];
                security.IsChecked = !security.IsChecked;
                m_lsvSecurities.Invalidate(hti.Item.Bounds);
            }
        };
        m_lsvSecurities.VirtualListSize = SecuritiesList.Count;
        _ = benchmark();
    }
    private List<Security> SecuritiesList { get; } = new List<Security>();
}

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生成3000个证券的列表并显示该列表后，2秒后调用benchmark()方法来测量获取需要检查的项目列表所需的时间，在本例中是“每四个项目”。

的数据

/// <summary>
    ///  Show the dialog, wait 2 seconds, then 
    ///  run conditional set check for 3000 items.
    /// </summary>
    async Task benchmark()
    {
        await Task.Delay(TimeSpan.FromSeconds(2));
        Text = DateTime.Now.ToString(@"hh\:mm\:ss\.ffff tt");
        screenshot("screenshot.1.png");
        var stopwatch = Stopwatch.StartNew();
        // Example of a function that will get list
        // of items that need to be checked.
        setListOfItemsConditionalChecked();
        m_lsvSecurities.Refresh();
        stopwatch.Stop();
        Text = DateTime.Now.ToString(@"hh\:mm\:ss\.ffff tt");
        await Task.Delay(TimeSpan.FromSeconds(0.5));
        MessageBox.Show($"{stopwatch.ElapsedMilliseconds} ms");
    }
    private void setListOfItemsConditionalChecked()
    {
        for (int i = 0; i < SecuritiesList.Count; i++) 
        {
            var mod = i + 1;
            SecuritiesList[i].IsChecked = (mod % 4 == 0);
        }
    }

型

列表项类

{
    public string Text { get; set; }
    public bool IsChecked { get; set; }
}

型