Excel 宏的运行时间越来越长

我的代码可以运行，但问题是运行时间越来越长，每次使用宏时，完成计算所需的时间都在增加。我已经尝试了sytax的各种变体和修改，但由于我对VBA非常陌生，我还没有取得很大的进展。下面是我正在运行的代码（注意，它是作为一个子集运行的，并且

ScreenUpdate=False

）：

这段代码基本上通过删除整行从数据中删除零值结果。最初，它的运行时间约为12秒，但很快就变为55秒，这已经演变为越来越长的运行时间，现在“快”的运行时间为5分钟。下面是一个电子表格，其中记录了运行时和相应的更改：

Runtime Changes
6:30    None
7:50    None
5:37    Manually stepped through code
7:45    Run with .cells instead of .range("B1:B" & lastRow)
5:21    Run with .Range(B:B)  instead of .range("B1:B" & lastRow)
9:20    Run with application.calculation disabled/enabled, range unchanged
5:35    Run with application.enableEvents disabled/enabled, range unchanged
11:08   Run with application.enableEvents disabled/enabled, Range(B:B)
5:12    None
7:57    Run with Alternative code (old code)
5:45    Range changed to .Range(cells(2,2), Cells(lastRow,2)
10:25   Range changed to .Range(cells(2,2), Cells(lastRow,2), Application.Calculation Disabled/enabled
5:34    Range set to rngB  for .delete portion (range assigned to variable)
9:59    Range set as rng("B1:F" & lastRow)
5:58    Changed system settings for Excel to "High Priority", code reverted to original
9:41    Rerun of old code for comparison
9:26    Reun with change in old code criteria to "0.000"
0:10    Moved SpecialCells……..Delete into 2nd With/End With
5:15    Rerun  SpecialCells……..Delete into 2nd With/End With
11:31   Rerun  SpecialCells……..Delete into 2nd With/End With
11:38   Excel restart; Rerun  SpecialCells……..Delete into 2nd With/End With
5:18    Excel restart; Rerun  SpecialCells……..Delete into 2nd With/End With
6:49    Removed 2nd with 'loop'; all data put into first with statement

我在网上做了一些研究，看起来这可能是Excel在处理大型数据集时遇到的一个已知问题，而我的数据是~51k行，我可以看到这种情况。“…在早期版本的Excel中需要几秒钟才能完成的宏在更高版本的Excel中可能需要几分钟才能完成。或者，如果您再次运行宏，则宏的运行时间可能是第一次的两倍。”来源：

---

所以我的问题是：有没有办法让它像最初那样运行得更快？为什么会发生这种情况？

以下是我通过将数据传输到数组，然后将数组打印到工作表中所做的几项测试的结果。这比任何复制/粘贴以及任何类型的

.Delete

方法都要高效得多，尤其是在循环中调用时

这些都在大约一秒钟内执行，“删除”了大约35000多行

Start 8/6/2014 1:51:14 PM
Start copy data to array 8/6/2014 1:51:14 PM    lastRow=50000
End copy data to array 8/6/2014 1:51:14 PM for 12270 rows
Start print to sheet 8/6/2014 1:51:14 PM
End print to sheet 8/6/2014 1:51:14 PM
Finished 8/6/2014 1:51:14 PM


Start 8/6/2014 1:51:15 PM
Start copy data to array 8/6/2014 1:51:15 PM    lastRow=50000
End copy data to array 8/6/2014 1:51:15 PM for 12339 rows
Start print to sheet 8/6/2014 1:51:15 PM
End print to sheet 8/6/2014 1:51:15 PM
Finished 8/6/2014 1:51:15 PM


Start 8/6/2014 1:51:16 PM
Start copy data to array 8/6/2014 1:51:16 PM    lastRow=50000
End copy data to array 8/6/2014 1:51:16 PM for 12275 rows
Start print to sheet 8/6/2014 1:51:16 PM
End print to sheet 8/6/2014 1:51:16 PM
Finished 8/6/2014 1:51:16 PM


Start 8/6/2014 1:51:17 PM
Start copy data to array 8/6/2014 1:51:17 PM    lastRow=50000
End copy data to array 8/6/2014 1:51:17 PM for 12178 rows
Start print to sheet 8/6/2014 1:51:17 PM
End print to sheet 8/6/2014 1:51:17 PM
Finished 8/6/2014 1:51:17 PM


Start 8/6/2014 1:51:18 PM
Start copy data to array 8/6/2014 1:51:18 PM    lastRow=50000
End copy data to array 8/6/2014 1:51:18 PM for 12130 rows
Start print to sheet 8/6/2014 1:51:18 PM
End print to sheet 8/6/2014 1:51:18 PM
Finished 8/6/2014 1:51:18 PM

下面是我用来测试它的代码：

Sub TimerLoop()
Dim i As Integer
For i = 1 To 5
    deleteRows
Next
End Sub

这是修改后的函数；请注意，我更改了过滤器参数，以确保删除足够多的行。在运行之前更改回您自己的标准

Public Sub deleteRows()
Range("B2:F50000").Formula = "=Round(Rand(),2)"

Dim values As Variant
Dim rng As Range
Dim visible As Range
Dim a As Range, r As Range
Dim nextRow As Long
Dim lastRow As Long
Dim totalRows As Long
Dim i As Long

Application.ScreenUpdating = False
Debug.Print "Start " & Now()

    With ActiveSheet
        .AutoFilterMode = False
        lastRow = .Cells(.Rows.Count, 2).End(xlUp).Row

        'Use a range variable instaead of literal construction:
        Set rng = .Range("B2:F" & lastRow)

            With rng
                .AutoFilter Field:=2, Criteria1:=">0.500", Operator:=xlFilterValues
                .AutoFilter Field:=5, Criteria1:=">0.500", Operator:=xlFilterValues
            End With

            'Assign the values to an array:
            Debug.Print "Start copy data to array " & Now() & vbTab & "lastRow=" & lastRow

            Set visible = rng.SpecialCells(xlCellTypeVisible)

            For Each a In visible.Areas
                For Each r In a.Rows
                totalRows = totalRows + 1
                'values(i) = r.Value
                Next
            Next

            ReDim values(1 To totalRows)

            For Each a In visible.Areas
                For Each r In a.Rows
                    i = i + 1
                    values(i) = r.Value
                Next
            Next


            'Turn off autofilter, clear the cells
            .AutoFilterMode = False
            rng.ClearContents
            Debug.Print "End copy data to array " & Now() & " for " & totalRows & " rows"
            'Put the values back in to the sheet, from the array
            Debug.Print "Start print to sheet " & Now()

            rng.Rows(1).Resize(totalRows).Value = _
                Application.Transpose(Application.Transpose(values))

            Debug.Print "End print to sheet " & Now()

        .AutoFilterMode = False
        Rows("1:1").Select
        Selection.Insert Shift:=xlDown, CopyOrigin:=xlFormatFromLeftOrAbove
    End With
Debug.Print "Finished " & Now() & vbCrLf & vbCrLf
Application.ScreenUpdating = True
End Sub

---

如果您的电子表格中有公式，我会在开头添加Application.Calculation=xlCalculationManual，并在结尾添加Application.Calculation=xlCalculationAutomatic，以确保您不会在每次删除行时都重新计算。

PS：运行时日志中引用的“旧代码”可以在此处找到：是格式重要吗？如果没有，可以尝试使用ADO查询出所需的单元格（字段2和5 0.000）并将记录集粘贴到新的工作表（甚至删除整个范围并仅粘贴查询的结果）？我看到了类似的问题，尽管我的第一次大约25秒，现在大约90秒用于后续运行。问题似乎出现在

.EntireRow.Delete

语句中，这是花费所有时间的地方。@JohnBustos很好的建议。复制过滤范围，然后删除整个范围，然后粘贴。还有一个同样好的建议@DavidZemens。。。停止删除特定行的需要…它肯定运行得更快，但我仍然平均每次运行3:30分钟。我在一台有双四核i7和32千兆内存的机器上进行处理，所以我不认为我的硬件有限。。。不过，我必须消除约20k行数据，这样才能解释时间差吗？运行代码时，第一次运行需要7秒，然后是3:36、3:04、4:14，第五次运行需要5:07。我被难住了，真奇怪。我有I5处理器，而且我很确定我也没有32GB的RAM。。。也许是在被删除的行中。格式化很重要，还是只粘贴值就可以了？另外，我应该补充一点，当我使用随机数据运行代码时，它会在不到一秒钟的时间内运行。我认为这表明运行时依赖于必须删除的行。大卫，你帮了大忙！非常感谢！我想出了一个办法让它工作，所以我想我准备好了。我真的很感谢你的帮助！

Public Sub deleteRows()
Range("B2:F50000").Formula = "=Round(Rand(),2)"

Dim values As Variant
Dim rng As Range
Dim visible As Range
Dim a As Range, r As Range
Dim nextRow As Long
Dim lastRow As Long
Dim totalRows As Long
Dim i As Long

Application.ScreenUpdating = False
Debug.Print "Start " & Now()

    With ActiveSheet
        .AutoFilterMode = False
        lastRow = .Cells(.Rows.Count, 2).End(xlUp).Row

        'Use a range variable instaead of literal construction:
        Set rng = .Range("B2:F" & lastRow)

            With rng
                .AutoFilter Field:=2, Criteria1:=">0.500", Operator:=xlFilterValues
                .AutoFilter Field:=5, Criteria1:=">0.500", Operator:=xlFilterValues
            End With

            'Assign the values to an array:
            Debug.Print "Start copy data to array " & Now() & vbTab & "lastRow=" & lastRow

            Set visible = rng.SpecialCells(xlCellTypeVisible)

            For Each a In visible.Areas
                For Each r In a.Rows
                totalRows = totalRows + 1
                'values(i) = r.Value
                Next
            Next

            ReDim values(1 To totalRows)

            For Each a In visible.Areas
                For Each r In a.Rows
                    i = i + 1
                    values(i) = r.Value
                Next
            Next


            'Turn off autofilter, clear the cells
            .AutoFilterMode = False
            rng.ClearContents
            Debug.Print "End copy data to array " & Now() & " for " & totalRows & " rows"
            'Put the values back in to the sheet, from the array
            Debug.Print "Start print to sheet " & Now()

            rng.Rows(1).Resize(totalRows).Value = _
                Application.Transpose(Application.Transpose(values))

            Debug.Print "End print to sheet " & Now()

        .AutoFilterMode = False
        Rows("1:1").Select
        Selection.Insert Shift:=xlDown, CopyOrigin:=xlFormatFromLeftOrAbove
    End With
Debug.Print "Finished " & Now() & vbCrLf & vbCrLf
Application.ScreenUpdating = True
End Sub