问背景线程减慢主UI线程visual

EN

Private Sub myThreadMethod()
    'Await
    'Async
    Dim myThread As New Thread(AddressOf myThreadMethod)
    myThread.IsBackground = True

    myThread.Start()
    If Me.InvokeRequired = True Then
        Me.Invoke(Sub()
                      'PbT.Location = New Point(128, 132)
                      PbT.Left -= 1
                      PbT.Top += 2
                  End Sub)
        'If PbT.Bounds.IntersectsWith(btnBot.Bounds) Then
        'TextBox1.Invoke(Sub() TextBox1.Text =
    End If
    If PbT.Location.Y > 500 Then
        PbT.Invoke(Sub() PbT.Location = New Point(350, 230))
        Thread.Sleep(9000)
        myThread.Abort()
    End If

End Sub

Public Class frmStart

Dim running As Boolean = False
Dim stopWatch As Stopwatch = New Stopwatch

Private Sub frmStart_MouseMove(sender As Object, e As MouseEventArgs) Handles Me.MouseMove
    Cursor.Clip = New Rectangle(Me.Location, Me.Size)
    btnLPad.Left = e.X
    btnCPad.Left = e.X + 28
    btnRPad.Left = e.X + 56
End Sub

Private Sub tmrMove_Tick(sender As Object, e As EventArgs) Handles tmrMove.Tick

    Static direction As New Point(0, 4)

    Static endTime As DateTime = DateTime.Now.AddYears(1)
    If DateTime.Now > endTime Then
        PbT.Visible = False
        endTime = DateTime.Now.AddYears(1)
    End If

    If _buttons.All(Function(x) x.Button.Visible = False) Then
        pbOne.Top = 300
        PbT.Visible = False
        tbAns.Visible = True

        stopWatch.Stop()
        Dim ts = stopWatch.Elapsed
        Dim elapsedTime = $"{ts.Minutes:0} Min {ts.Seconds:00} Sec"
        tbAns.Text = elapsedTime

        running = False
        direction = New Point(0, 4)

        tmrMove.Stop()
        MsgBox("You Win")
        stopWatch.Reset()
        '================
        tbAns.Visible = False
        ResetButtons()

    End If

    If pbOne.Bounds.IntersectsWith(btnLPad.Bounds) Then
        direction = New Point(-2, -3)
    End If
    If pbOne.Bounds.IntersectsWith(btnRight.Bounds) Then
        Static spC As Integer = 1
        spC += 1
        direction = If(spC Mod 2 = 0, New Point(-3, 2), New Point(-5, 1))
    End If

    If pbOne.Bounds.IntersectsWith(btnLeft.Bounds) Then
        direction = New Point(4, 2)
    End If

    If pbOne.Bounds.IntersectsWith(btnCPad.Bounds) Then
        direction = New Point(direction.X, -4)
    End If

    If pbOne.Bounds.IntersectsWith(btnRPad.Bounds) Then
        Static spA As Integer = 1
        spA += 1
        direction = If(spA Mod 2 = 0, New Point(1, -5), New Point(-3, -4))
    End If

    If pbOne.Bounds.IntersectsWith(btnTop.Bounds) Then
        Static spE As Integer = 1
        spE += 1
        direction = If(spE Mod 2 = 0, New Point(-3, 2), New Point(4, 2))
    End If

    If pbOne.Bounds.IntersectsWith(btnBot.Bounds) Then
        tmrMove.Stop()
        running = False
        pbOne.Top = 200
        PbT.Visible = False
        MsgBox("Press S to Start")
    End If

    pbOne.Left += direction.X
    pbOne.Top += direction.Y

    For Each x In _buttons
        If pbOne.Bounds.IntersectsWith(x.Button.Bounds) Then
            endTime = DateTime.Now.AddSeconds(2.0)
            x.Button.Visible = False
            x.Button.Location = New Point(350, -30)
            PbT.Location = New Point(x.Location.X + 20, 31)
            PbT.Visible = True
            direction = New Point(3, 3)
        End If
    Next
End Sub
Private Sub frmStart_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown

    If running AndAlso e.KeyCode = Keys.P Then
        tmrMove.Stop()
    End If

    If e.KeyCode = Keys.S Then

        If Not running Then
            stopWatch.Start()
            running = True
        End If

        tmrMove.Interval = 1
        tmrMove.Start()

    End If

End Sub
Public Sub frmStart_KeyPress(sender As Object, e As KeyPressEventArgs) Handles Me.KeyPress
    'Form Property KeyPreview needs to be set to True
    '=================================================

    If Asc(e.KeyChar) = 27 Then

        Const message As String = "YES" & "   Exit Program" + vbCrLf + vbNewLine + "NO" & "     Read Directions"
        Const caption As String = "Exit OR Return"

        Dim result = MessageBox.Show(message, caption, MessageBoxButtons.YesNo, MessageBoxIcon.Question)

        If result = DialogResult.Yes Then
            Application.Exit()
        ElseIf result = DialogResult.No Then
            frmInfo.Show()
            Close()
        End If
    End If

End Sub

Private _buttons As (Button As Button, Location As Point)() = Nothing

Private Sub frmStart_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    If _buttons Is Nothing Then
        _buttons =
        {
            (btnB1, New Point(29, 32)),
            (btnB2, New Point(110, 32)),
            (btnB3, New Point(191, 32)),
            (btnB4, New Point(272, 32)),
            (btnB5, New Point(353, 32)),
            (btnB6, New Point(434, 32)),
            (btnB7, New Point(515, 32)),
            (btnB8, New Point(596, 32)),
            (btnB9, New Point(677, 32))
        }
    End If
    ResetButtons()
End Sub

Private Sub ResetButtons()
    For Each x In _buttons
        x.Button.Visible = True
        x.Button.Location = x.Location
    Next
End Sub