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我想通過循環每個數據類型（整數，雙精度，十進制和變量）的一百萬個隨機數後測試數據類型之間的執行時間差異。我從微軟開發者網站獲取了這段代碼。我使用Excel 2010中VBA QueryPerformanceCounter不工作
這裏是代碼：
Option Explicit
Sub Function1()
Module Module1
Declare Function QueryPerformanceCounter Lib "Kernel32" (ByRef X As Long) As Short
Declare Function QueryPerformanceFrequency Lib "Kernel32" (ByRef X As Long) As Short
Dim Ctr1, Ctr2, Freq As Long
Dim Acc, I As Integer
' Times 100 increment operations by using QueryPerformanceCounter.
If QueryPerformanceCounter(Ctr1) Then ' Begin timing.
For I = 1 To 100 ' Code is being timed.
Acc += 1
Next
QueryPerformanceCounter (Ctr2) ' Finish timing.
Console.WriteLine ("Start Value: " & Ctr1)
Console.WriteLine ("End Value: " & Ctr2)
QueryPerformanceFrequency (Freq)
Console.WriteLine ("QueryPerformanceCounter minimum resolution: 1/" & Freq & " seconds.")
Console.WriteLine ("100 Increment time: " & (Ctr2 - Ctr1)/Freq & " seconds.")
Else
Console.WriteLine ("High-resolution counter not supported.")
End If
'
' Keep console window open.
'
Console.WriteLine()
Console.Write ("Press ENTER to finish ... ")
Console.Read()
End Module
End Sub
Sub Function1_Int_RandNumCounter()
Dim Int_RandNum_X As Integer
Dim Int_RandNum_Y As Integer
Dim Count As Integer
For Count = 1 To Count = 1000000
Int_RandNum_X = Rnd(Now) ' Get rnd vals based on Now, built-in VBA property
Int_RandNum_Y = Rnd(Now)
Next Count
' Call Function1_Dbl_RandNumCounter
End Sub
Sub Function1_Dbl_RandNumCounter()
Dim Dbl_RandNum_X As Double, Dbl_RandNum_Y As Double, Count As Double
For Count = 1 To Count = 1000000
Dbl_RandNum_X = Rnd(Now) ' Get rnd vals based on Now, built-in VBA property
Dbl_RandNum_Y = Rnd(Now)
Next Count
Call Function1_Var_RandNumCounter
End Sub
Sub Function1_Var_RandNumCounter()
Dim Var_RandNum_X, Var_RandNum_Y, Count As Variant
For Count = 1 To Count = 1000000
Var_RandNum_X = Rnd(Now) ' Get rnd vals based on Now, built-in VBA property
Var_RandNum_Y = Rnd(Now)
Next Count
Call Function1_Dec_RandNumCounter
End Sub
Sub Function1_Dec_RandNumCounter()
Dim Count, Var_RandNum_X, dec_RandNum_X, Var_RandNum_Y, dec_RandNum_Y
dec_RandNum_X = CDec(Var_RandNum_X)
dec_RandNum_Y = CDec(Var_RandNum_Y) ' convert these vals to decimals
For Count = 1 To Count = 1000000
dec_RandNum_X = Rnd(Now) ' Get rnd vals based on Now, built-in VBA property
dec_RandNum_Y = Rnd(Now)
Next Count
Call Function2_BarGraph
End Sub
Sub Function2_BarGraph()
' Put all of these vals in a 2D bar graph
End Sub
此代碼給了我的錯誤，如：
Compile error:
Only comments may appear after End Sub, End Function, or End Property
編輯：這裏是代碼，它具有的改進版沒有編譯錯誤，但我不知道如何將定時器集成到我的函數中。
Option Explicit
Private Type LARGE_INTEGER
lowpart As Long
highpart As Long
End Type
Private Declare Function QueryPerformanceCounter Lib "kernel32" (lpPerformanceCount As LARGE_INTEGER) As Long
Private Declare Function QueryPerformanceFrequency Lib "kernel32" (lpFrequency As LARGE_INTEGER) As Long
Private m_CounterStart As LARGE_INTEGER
Private m_CounterEnd As LARGE_INTEGER
Private m_crFrequency As Double
Private Const TWO_32 = 4294967296# ' = 256# * 256# * 256# * 256#
Private Function LI2Double(LI As LARGE_INTEGER) As Double
Dim Low As Double
Low = LI.lowpart
If Low < 0 Then
Low = Low + TWO_32
End If
LI2Double = LI.highpart * TWO_32 + Low
End Function
Private Sub Class_Initialize()
Dim PerfFrequency As LARGE_INTEGER
QueryPerformanceFrequency PerfFrequency
m_crFrequency = LI2Double(PerfFrequency)
End Sub
Public Sub StartCounter()
QueryPerformanceCounter m_CounterStart
End Sub
Property Get TimeElapsed() As Double
Dim crStart As Double
Dim crStop As Double
QueryPerformanceCounter m_CounterEnd
crStart = LI2Double(m_CounterStart)
crStop = LI2Double(m_CounterEnd)
TimeElapsed = 1000# * (crStop - crStart)/m_crFrequency
End Property
Sub Function1_Int_RandNumCounter()
Dim Int_RandNum_X As Integer
Dim Int_RandNum_Y As Integer
Dim Count As Integer
For Count = 1 To Count = 1000000
Int_RandNum_X = Rnd(Now) ' Get rnd vals based on Now, built-in VBA property
Int_RandNum_Y = Rnd(Now)
Next Count
' Call Function1_Dbl_RandNumCounter
End Sub
Sub Function1_Dbl_RandNumCounter()
Dim Dbl_RandNum_X As Double, Dbl_RandNum_Y As Double, Count As Double
For Count = 1 To Count = 1000000
Dbl_RandNum_X = Rnd(Now) ' Get rnd vals based on Now, built-in VBA property
Dbl_RandNum_Y = Rnd(Now)
Next Count
Call Function1_Var_RandNumCounter
End Sub
Sub Function1_Var_RandNumCounter()
Dim Var_RandNum_X, Var_RandNum_Y, Count As Variant
For Count = 1 To Count = 1000000
Var_RandNum_X = Rnd(Now) ' Get rnd vals based on Now, built-in VBA property
Var_RandNum_Y = Rnd(Now)
Next Count
Call Function1_Dec_RandNumCounter
End Sub
Sub Function1_Dec_RandNumCounter()
Dim Count, Var_RandNum_X, dec_RandNum_X, Var_RandNum_Y, dec_RandNum_Y
dec_RandNum_X = CDec(Var_RandNum_X)
dec_RandNum_Y = CDec(Var_RandNum_Y) ' convert these vals to decimals
For Count = 1 To Count = 1000000
dec_RandNum_X = Rnd(Now) ' Get rnd vals based on Now, built-in VBA property
dec_RandNum_Y = Rnd(Now)
Next Count
Call Function2_BarGraph
End Sub
Sub Function2_BarGraph()
' Put all of these vals in a 2D bar graph
End Sub
編輯：新VBA代碼（爲什麼我設置了該功能正常嗎？）
Sub Function1_Int_RandNumCounter()
Dim Int_RandNum_X As Integer
Dim Int_RandNum_Y As Integer
Dim Count As Integer
Dim oPM As PerformanceMonitor
Dim Time_Int As Variant
Time_Int = CDec(Time_Int)
Set oPM = New PerformanceMonitor
oPM.StartCounter
For Count = 1 To Count = 1000000
Int_RandNum_X = Rnd(Now) ' Get rnd vals based on Now, built-in VBA property
Int_RandNum_Y = Rnd(Now)
Next
Time_Int = oPM.TimeElapsed
' Call Function1_Dbl_RandNumCounter
End Sub
這是VB.Net代碼，而不是VBA。 –
僅供參考您的基準類型，但很少聲明它們。 dim a，b as T'只宣佈'b'爲'T'。 –
我建議你閱讀：http://stackoverflow.com/questions/198409/how-do-you-test-running-time-of-vba-code – Rory