正如标题所述，匹配功能花费的时间太长。一个电子表格的行长为100,000行，并且其中有一堆证券，我需要确保它们位于另一个具有80万行的电子表格中。下面是代码：
仅供参考，我在代码构建方面很一般，因此在提出自己的论点方面我还很初级。
Option Explicit
'a lot of dims
StartTime = Timer
Set ShVar = ThisWorkbook.Worksheets("in1")
With wnewwqr
Set OutShVar = wnewwqr.Worksheets("First Sheet")
Set RngConcat = OutShVar.Range("B:B")
Set RngConcatISIN = OutShVar.Range("A:A")
Set OutShVar1 = wnewwqr.Worksheets("Second Sheet")
Set RngConcat1 = OutShVar1.Range("B:B")
Set RngConcatISIN1 = OutShVar1.Range("A:A")
End With
With ShVar
lastrow = .Cells(.Rows.Count, "H").End(xlUp).Row
End With
For i = 2 To lastrow
With ShVar
If .Range("O" & i).Value = "" Then
.Range("P" & i & ":Q" & i).Value = "No Security" 'Checking for no securities
Else
If Not IsError(Application.Match(.Range("O" & i).Value, RngConcat, 0)) Then
.Range("P" & i).Value = "US" ' writing US when it finds a US security in the confidential workbook
Else
.Range("P" & i).Value = "Not a US Security"
End If
End If
If .Range("P" & i).Value = "Not a US Security" Then
If Not IsError(Application.Match(.Range("O" & i).Value, RngConcat1, 0)) Then 'Only searching for securities if the first vlookup resulted in nothing and then it would go into the second sheet
.Range("Q" & i).Value = "US"
Else
.Range("Q" & i).Value = .Range("P" & i).Value
End If
End If
End With
Next i
SecondsElapsed = Round(Timer - StartTime, 2)
'Notify user in seconds
MsgBox "This code ran successfully in " & SecondsElapsed & " seconds", vbInformation
End Sub
更新：
我已将所有内容都转换为变体，现在使用查找功能，但仍然没有我希望的那么快。约14分钟做2000行的试运行而且我必须在90,000行上这样做
Option Explicit
Sub something
Dim lastrow As Long
Dim OutShVar As Worksheet
Dim ShVar As Worksheet
Dim WhatCell As Range
Dim i As Long
Dim TaskID As Variant
Dim confidentialfp As String
Dim confidential As String
Dim wconfidential As Workbook
Dim x As Variant
Set ShVar = ThisWorkbook.Worksheets("in1")
With ShVar
lastrow = .Cells(.Rows.Count, "H").End(xlUp).Row
End With
confidential = "confidential_2018-03-01 (Consolidated).xlsx"
Set wconfidential = Workbooks(confidential)
With wconfidential
Set OutShVar = .Worksheets("First Sheet")
End With
With ShVar
For i = 1 To lastrow
TaskID = ShVar.Range("O" & i).Value
Set x = .Range("A" & i)
Set WhatCell = OutShVar.Range("B:B").Find(TaskID, lookat:=xlWhole)
On Error Resume Next
x.Offset(0, 7).Value = WhatCell.Offset(0, 1)
Next i
End With
End Sub
答案 0 :(得分：1)
我不确定您是否完全了解ScottCraner的观点。他的意思是，您应该将所有参考值（即大量证券）读入几个数组，并将输出值写入另一个数组。然后，您可以通过一个命令将整个输出数组写入工作表。
将证券列表转换为Collection可能也是值得的，因为它具有非常快的“查找”功能。有一些方法可以使速度更快，例如通过对证券进行排序，但是您需要为此进行一些数学研究。
在下面的示例中，此框架代码显示了可能如何完成。您应该知道，我没有费心将两个证券清单分为两个集合，因此如果需要，您可以自己做。我还将所有测试表放在同一工作簿上，因此请根据需要调整工作表限定符：
Option Explicit
Sub RunMe()
Dim securities As Collection
Dim testSheet As Worksheet
Dim testItems As Variant
Dim i As Long
Dim exists As Boolean
Dim output() As Variant
'Read the first list of securities into the collection.
PopulateColumnCollection _
ThisWorkbook.Worksheets("First Sheet"), _
"B", _
securities
'Read the second list of securities into the collection.
'I've used the same collection in this example, you'll need
'to create two if you want separate columns in your output.
PopulateColumnCollection _
ThisWorkbook.Worksheets("Second Sheet"), _
"B", _
securities
'Read the test items into an array.
Set testSheet = ThisWorkbook.Worksheets("in1")
With testSheet
testItems = RangeTo2DArray(.Range( _
.Cells(2, "O"), _
.Cells(.Rows.Count, "O").End(xlUp)))
End With
'Prepare your output array.
'I've just used one column for output. If you want two then
'you'll need to resize the second dimension.
ReDim output(1 To UBound(testItems, 1), 1 To 1)
'Populate the output array based on the presence of
'a matching security.
For i = 1 To UBound(testItems, 1)
If IsEmpty(testItems(i, 1)) Then
output(i, 1) = "No Security"
Else
exists = False: On Error Resume Next
exists = securities(CStr(testItems(i, 1))): On Error GoTo 0
output(i, 1) = IIf(exists, "US", "Not a US Security")
End If
Next
'Write the output array to your sheet.
testSheet.Cells(2, "P").Resize(UBound(output, 1), UBound(output, 2)).Value = output
End Sub
Private Function RangeTo2DArray(rng As Range) As Variant
'Helper function to read range values into an array.
Dim v As Variant
Dim arr(1 To 1, 1 To 1) As Variant
v = rng.Value2
If Not IsArray(v) Then
arr(1, 1) = v
RangeTo2DArray = arr
Else
RangeTo2DArray = v
End If
End Function
Private Sub PopulateColumnCollection(ws As Worksheet, columnIndex As String, col As Collection)
'Helper sub to read a column of values into a collection.
Dim rng As Range
Dim v As Variant
Dim i As Long
With ws
Set rng = .Range( _
.Cells(1, columnIndex), _
.Cells(.Rows.Count, columnIndex).End(xlUp))
End With
v = RangeTo2DArray(rng)
If col Is Nothing Then Set col = New Collection
On Error Resume Next 'this avoids duplicates.
For i = 1 To UBound(v, 1)
col.Add True, CStr(v(i, 1))
Next
End Sub