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  1. Sub main()
  2.    Dim no, i, t1, t2 As Long
  3.    Dim sum, dt As Double
  4.    
  5.    no = 100000000
  6.    ct = 0
  7.    
  8.    While (no > 1)
  9.       ct = ct + 1
  10.       
  11.       t1 = time1()
  12.       sum = 0#
  13.       For i = 1 To no
  14.          sum = sum + i
  15.       Next i
  16.       dt = time2(t1)
  17.       
  18.       Cells(ct, 1) = no
  19.       Cells(ct, 2) = dt
  20.       
  21.       no = no / 3
  22.    Wend
  23. End Sub

  24. Function time1() As Long
  25.    Dim a As Double

  26.    a = Timer * 1000
  27.    time1 = Int(a + 0.5)
  28. End Function

  29. Function time2(ByVal t1 As Long) As Double
  30.    Dim t2 As Long
  31.    Dim dt As Double
  32.    t2 = time1()
  33.    dt = (t2 - t1) / 1000#
  34.    
  35.    ' dt must >- 0.0
  36.    If (dt < 0#) Then
  37.       dt = dt + 86400#
  38.    End If
  39.    
  40.    time2 = dt
  41. End Function
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  1. Sub Test()
  2.   Dim t1 As Single
  3.   Dim d1 As Double
  4.   
  5.   t1 = Timer
  6.   Debug.Print "t1=", t1
  7.   Debug.Print "Cdbl(t1)=", CDbl(t1)
  8.   d1 = t1
  9.   Debug.Print "d1=", d1
  10. End Sub
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