the below code used to:
Concatenate the values on a specific column "N" depend on the value of column "A" then delete the remaining rows.

It works, but with range of 30k rows the macro takes a long time to finish (14 seconds) on powerful PC.

the bottle neck is on this line .SpecialCells(xlCellTypeConstants).EntireRow.Delete
(it takes 13.5 seconds) from the overall code time ( 14 seconds).
I tried to replace it with VBA AutoFilter , but the same issue.

This is updated screenshot: of current values and the current result,

enter image description here

My goal is to do all processing on arrays or dictionary to achieve the fastest speed.
I have office 2016 on my work.

Option Explicit
Option Compare Text

Sub Concatenate_column_N_values_Delete_remaining_Rows()

    Dim t: t = Timer

    Const sep As String = vbLf
    Dim arrKeys, arrVals, arrFlags, rngRows As Range, key, currKey, s As String
    Dim ub As Long, n As Long, ws As Worksheet, rngVals As Range, i As Long
    Set ws = ActiveSheet
    Set rngRows = ws.Range("A2:A" & ws.Cells(ws.Rows.Count, "A").End(xlUp).Row)   'Column Contains WO
    Set rngVals = rngRows.EntireRow.Columns("N")     'Column contains pure string
    Application.ScreenUpdating = False
    arrKeys = rngRows.Value2
    ub = UBound(arrKeys, 1)
    arrVals = rngVals.Value2
    ReDim arrFlags(1 To UBound(arrKeys, 1), 1 To 1)
    currKey = Chr(0)     'non-existing key...
    For i = ub To 1 Step -1                      'looping from bottom up
        key = arrKeys(i, 1)                      'this row's key
        If key <> currKey Then                   'different key from row below?
            If i < ub Then arrVals(i + 1, 1) = s 'populate the collected info for any previous key
            s = arrVals(i, 1)                    'collect this row's "N" value
            currKey = key                        'set as current key
            If i < ub Then
                arrFlags(i + 1, 1) = "x" 'flag for deletion
                n = n + 1
            End If
            s = arrVals(i, 1) & sep & s             'concatenate the "N" value
        End If
    Next i
    arrVals(1, 1) = s                              'populate the last (first) row...
    rngVals.Value = arrVals                        'drop the concatenated values
    If n > 0 Then    'any rows to delete?
        With rngRows.Offset(0, 100) 'use any empty column
            .Value = arrFlags
        End With
    End If
    Application.ScreenUpdating = True
    Debug.Print "Concatenate_column_N_values_Delete_remaining_Rows, in " & Round(Timer - t, 2) & " sec"
End Sub
  • 1
    \$\begingroup\$ You can do this almost instantly with powerquery groupby learn.microsoft.com/en-us/power-query/group-by. Alternatively using the new array helper functions UNIQUE & BYROW should be pretty speedy for that amount of data (not that I've got anything against VBA, I just don't think it's great for data manipulation) \$\endgroup\$
    – Greedo
    Apr 17, 2023 at 17:41

2 Answers 2


As mentioned, in Excel 2016 you should have access to the Power Query Editor through Data tab -> From Table/Range

Then combining the text as you have done and loading to a new table should be easy - this is the entire code:

Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
Concat = Table.Group(Source, {"WO"}, {{"TEXT", each Text.Combine([TEXT]," "), type text}})

The first line loads "Table1" from your workbook. The second line Groups the table rows based on {"WO"} column, and aggregates each group of rows using the Text.Combine function on the [TEXT] column of the table, with spaces as separators.

To generate that you follow these steps:

  • Click inside the table with the data
  • Data Tab -> From Table/Range to launch PowerQuery (PQ)
  • Home -> GroupBy
  • Choose the WO column in the first dropdown, and for the aggregation function choose anything, we'll overwrite this
  • Click okay and now in the formula bar you should see = Table.Group(#"Changed Type", {"WO"} ..., replace that with = Table.Group(#"Changed Type", {"WO"}, {{"TEXT", each Text.Combine([TEXT]," "), type text}}). Hit enter
    • Optional - In the steps pane on the right you can right click delete the Changed Type step as it is not really needed. You can also rename the steps.
  • Now in the top left hit the close and load 💾 icon and your PQ will load to a new tab by default. Every time your source data changes, go Data -> Refresh All to re-run the PQ.
    • Optional - You can use the dropdown under the save icon to Close and Load To a different location, e.g. a table next to the source data

final result


Like VBA

  • It is built into Excel and the powerquery travels embedded in your workbook so you won't lose it
  • It can dynamically switch to pulling data from different sources

This is an improvement over VBA because

  • It is simpler (much less code) and easier to understand, adjust and modify as a result
  • It should be very fast, powerquery can run multithreaded and generally is optimised for data manipulation
  • You will find it supports built in features VBA does not, if you want to build on this data manipulation in future
  • The editor for powerquery is graphical - so you don't type the code but instead click buttons to insert it for you, making it simpler to learn and less error prone


To join with newlines use Text.Combine([TEXT],"#(cr)#(lf)") instead of Text.Combine([TEXT]," "), or use Lines.ToText([TEXT]) but this adds a trailing newline.

  • \$\begingroup\$ I tried, but I got a space between each text and I need each text to be on a new line like my provided photo. I replaced " " with vbCrLf but it did not work , = Table.Group(#"Changed Type", {"WO"}, {{"Urlname", each Text.Combine([Urlname], vbCrLf), type text}}) \$\endgroup\$
    – Leedo
    Apr 19, 2023 at 6:30
  • \$\begingroup\$ @Leedo sorry different spot that. You can use Lines.ToText([Urlname]) or Text.Combine([Urlname], "#(lf)") instead I believe stackoverflow.com/q/63959297/6609896 \$\endgroup\$
    – Greedo
    Apr 19, 2023 at 8:40
  • 1
    \$\begingroup\$ @Leedo see update. please let me know the performance \$\endgroup\$
    – Greedo
    Apr 19, 2023 at 9:01
  • \$\begingroup\$ I tried and it works, up-voted. \$\endgroup\$
    – Leedo
    Apr 19, 2023 at 11:40

The Bottle Neck:

the bottle neck is on this line .SpecialCells(xlCellTypeConstants).EntireRow.Delete
(it takes 13.5 seconds) from the code overall time ( 14 seconds).


It is tuned out that deletion of a lot of non-continuous rows takes a lot of time to finish, even after using Application optimizations (ScreenUpdateing.False,...)


I tried another approach by sort the values (rows) which need to be deleted and then set this rows to a range and then delete that range ,
I measured (Sorting values + Deletion of that range) and it toke 0.12 sec to finish (significantly faster).

I replaced .SpecialCells(xlCellTypeConstants).EntireRow.Delete with the below code.

Sub Sort_vlaues_x_and_Delete()

    Dim ws As Worksheet:   Set ws = ActiveSheet
    Dim rng As Range, lastR As Long, lastC As Long, lastcol As String
     lastR = ws.Cells(ws.Rows.Count, "A").End(xlUp).Row                    'Last Row number on coulmn A
      lastC = ws.Cells(1, ws.Columns.Count).End(xlToLeft).Column + 1       'next Last Column on Row 1
       lastcol = Split(Cells(1, lastC).Address(True, False), "$")(0)       'Last Column Letter

    Set rng = ws.Range(ws.Cells(1, 1), ws.Cells(lastR, lastC))
   Application.ScreenUpdating = False
   Application.Calculation = xlCalculationManual
'--- Sort values x

     ws.Sort.SortFields.Add key:=Range(lastcol & "2:" & lastcol & lastR), SortOn:=xlSortOnValues, Order:=xlAscending, DataOption:=xlSortNormal
       With ws.Sort
          .SetRange Range("A1:" & lastcol & lastR)
          .Header = xlYes: .MatchCase = False
          .Orientation = xlTopToBottom: .SortMethod = xlPinYin
       End With
'--- Delete range of values x

    lastR = ws.Cells(ws.Rows.Count, lastcol).End(xlUp).Row
     Set rng = ws.Range(ws.Cells(2, 1), ws.Cells(lastR, lastC))
    Application.Calculation = xlCalculationAutomatic
    Application.ScreenUpdating = True

End Sub 

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.