How to speed up index match function

F

fluffyvampirekitten

Board Regular
Joined
Jul 1, 2015
Messages
72
I have this line of codes
however , my excel will lag and most of the time it will stop responding .
Why? :(
Cross Ref: How to speed up this index match function

Any suggestion ?

Code: 
Private Sub Unsuccessful()
'Update Column S and T
'S = Active Ext ID , T = Inactive Ext ID
Dim MaxRowNum As Long
Sheets("SimPat").Select
'Set up an Error handler
On Error GoTo errorFound
Err.Clear
On Error GoTo 0
    
'Vlookup/IndexMatch Active Ext ID
Range("S2").FormulaR1C1 = _
      "=INDEX('[PatientMerge.xls]2015'!C10,MATCH(C[-16],'[PatientMerge.xls]2015'!C10,0))"
'Vlookup/IndexMatch Inactive Ext ID
Range("T2").FormulaR1C1 = _
      "=INDEX('[PatientMerge.xls]2015'!C11,MATCH(C[-17],'[PatientMerge.xls]2015'!C11,0))"
    
    
    'Locate last filled row in column S (this instead of the loop)
    MaxRowNum = Range("S" & Rows.Count).End(xlUp).Row
 
    
    'Autofill the rest of the rows
    Range("S2:T2").Select
    Selection.AutoFill Destination:=Range("S2:T2" & MaxRowNum), Type:=xlFillDefault
    'Column S and T Autofit
    Columns("S:T").Select
    Columns("S:T").EntireColumn.AutoFit
            
    'Copy and Paste data as value
    Sheets("SimPat").Select 'Activate/Open Simpat again
    Range("S2:T2" & MaxRowNum).Select
    Selection.Copy
    Worksheets("Simpat").Range("U2:V2" & MaxRowNum).Select
    Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
       :=False, Transpose:=False
       
    Columns("S:S").Select
    Selection.Delete Shift:=xlToLeft
    Columns("T:T").Select
    Selection.Delete Shift:=xlToLeft
       
    Application.CutCopyMode = False
    
With Application
        .ScreenUpdating = True
        .Calculation = xlCalculationAutomatic
End With

'Close the error Handler
Exit Sub
errorFound:
If Err.Number > 0 Then MsgBox Err.Description, vbCritical, "Error#: & Err.Number"
Err.Clear
End Sub
 
Sort by date Sort by votes
Yes....
Code: 
Private Sub Unsuccessful3()
'Update Column S and T
'S = Active Ext ID , T = Inactive Ext ID
Dim MaxRowNum As Long
With Application
        .ScreenUpdating = False
        .Calculation = xlCalculationManual
End With
Sheets("SimPat").Select
'Set up an Error handler
On Error GoTo errorFound
Err.Clear
On Error GoTo 0
    'Locate last filled row in column S (this instead of the loop)
    MaxRowNum = Range("C" & Rows.Count).End(xlUp).Row
'Vlookup/IndexMatch Active Ext ID
Range("S2:S" & MaxRowNum).Formula = "INDEX('[PatientMerge.xls]2015'!$J:$J,MATCH(C:C,'[PatientMerge.xls]2015'!$J:$J,0))"
'Vlookup/IndexMatch Inactive Ext ID
Range("T2:T" & MaxRowNum).Formula = "=INDEX('[PatientMerge.xls]2015'!$K:$K,MATCH(C:C,'[PatientMerge.xls]2015'!$K:$K,0))"
With Range("S2:T" & MaxRowNum)
        .Value = .Value
End With
    Columns("S:T").EntireColumn.AutoFit
With Application
        .ScreenUpdating = True
        .Calculation = xlCalculationAutomatic
End With
'Close the error Handler
Exit Sub
errorFound:
If Err.Number > 0 Then MsgBox Err.Description, vbCritical, "Error#: & Err.Number"
Err.Clear
End Sub

My Patient File have thousands of records
Click to expand...
But not 1 million.....by reducing the ranges to say 10,000 or 20,000, you will speed up the calculations considerably
 
Upvote 0

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Michael M said:
Yes....
Code: 
Private Sub Unsuccessful3()
'Update Column S and T
'S = Active Ext ID , T = Inactive Ext ID
Dim MaxRowNum As Long
With Application
        .ScreenUpdating = False
        .Calculation = xlCalculationManual
End With
Sheets("SimPat").Select
'Set up an Error handler
On Error GoTo errorFound
Err.Clear
On Error GoTo 0
    'Locate last filled row in column S (this instead of the loop)
    MaxRowNum = Range("C" & Rows.Count).End(xlUp).Row
'Vlookup/IndexMatch Active Ext ID
Range("S2:S" & MaxRowNum).Formula = "INDEX('[PatientMerge.xls]2015'!$J:$J,MATCH(C:C,'[PatientMerge.xls]2015'!$J:$J,0))"
'Vlookup/IndexMatch Inactive Ext ID
Range("T2:T" & MaxRowNum).Formula = "=INDEX('[PatientMerge.xls]2015'!$K:$K,MATCH(C:C,'[PatientMerge.xls]2015'!$K:$K,0))"
With Range("S2:T" & MaxRowNum)
        .Value = .Value
End With
    Columns("S:T").EntireColumn.AutoFit
With Application
        .ScreenUpdating = True
        .Calculation = xlCalculationAutomatic
End With
'Close the error Handler
Exit Sub
errorFound:
If Err.Number > 0 Then MsgBox Err.Description, vbCritical, "Error#: & Err.Number"
Err.Clear
End Sub


But not 1 million.....by reducing the ranges to say 10,000 or 20,000, you will speed up the calculations considerably
Click to expand...


Okay , let's say if i reduce the range to around 5000 or 10000 , is it possible to create an error box , if i didnt satisfy the maxrownum of "SimPat" ?
 
Upvote 0
Why not simply make it large enough ???
If you used 100,000 it would still be 90% less than what you have now !!!
 
Upvote 0
Can I take a step back and ask what you want to match?

The reason I ask is because your code puts this formula in cell S2...
=INDEX('[PatientMerge.xls]2015'!$J:$J,MATCH(C:C,'[PatientMerge.xls]2015'!$J:$J,0))

Do you want to change C:C to C2 so as to lookup the value in from cell C2?

Why return the Indexed value from column J; the same column the match is searched within? And if it's a match, it's the same value in C2?
 
Upvote 0
AlphaFrog said:
Can I take a step back and ask what you want to match?

The reason I ask is because your code puts this formula in cell S2...
=INDEX('[PatientMerge.xls]2015'!$J:$J,MATCH(C:C,'[PatientMerge.xls]2015'!$J:$J,0))

Do you want to change C:C to C2 so as to lookup the value in from cell C2?

Why return the Indexed value from column J; the same column the match is searched within? And if it's a match, it's the same value in C2?
Click to expand...

Column J is in another workbook , yes its the same as C2( but C2 is at Simpat file) .
The another workbook is the main workbook( hold more information )
Okay ill make changes ^^
 
Upvote 0
Even if you change C:C to C2, I still don't understand the purpose of the lookup. Do you just want to know if C2 exists in the other workbook?
 
Upvote 0
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