Databases
StackOverflow2013
Postsdbo
POHow can I make this PowerShell script parse large files faster?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow can I make this PowerShell script parse large files faster?
    primarykey
    data
    text
    <p>I have the following PowerShell script that will parse some very large file for <a href="https://en.wikipedia.org/wiki/Extract,_transform,_load" rel="nofollow noreferrer">ETL</a> purposes. For starters my test file is ~ 30&nbsp;MB. Larger files around 200&nbsp;MB are expected. So I have a few questions.</p> <p>The script below works, but it takes a very long time to process even a 30&nbsp;MB file.</p> <h2>PowerShell Script:</h2> <pre><code>$path = "E:\Documents\Projects\ESPS\Dev\DataFiles\DimProductionOrderOperation" $infile = "14SEP11_ProdOrderOperations.txt" $outfile = "PROCESSED_14SEP11_ProdOrderOperations.txt" $array = @() $content = gc $path\$infile | select -skip 4 | where {$_ -match "[|].*[|].*"} | foreach {$_ -replace "^[|]","" -replace "[|]$",""} $header = $content[0] $array = $content[0] for ($i = 1; $i -le $content.length; $i+=1) { if ($array[$i] -ne $content[0]) {$array += $content[$i]} } $array | out-file $path\$outfile -encoding ASCII </code></pre> <h2>DataFile Excerpt:</h2> <pre><code>--------------------------- |Data statistics|Number of| |-------------------------| |Records passed | 93,118| --------------------------- 02/14/2012 Production Operations and Confirmations 2 ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Production Operations and Confirmations ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |ProductionOrderNumber|MaterialNumber |ModifiedDate|Plant|OperationRoutingNumber|WorkCenter|OperationStatus|IsActive| WbsElement|SequenceNumber|OperationNumber|OperationDescription |OperationQty|ConfirmedYieldQty|StandardValueLabor|ActualDirectLaborHrs|ActualContractorLaborHrs|ActualOvertimeLaborHrs|ConfirmationNumber| |---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| |180849518 |011255486L1 |02/08/2012 |2101 | 9901123118|56B30 |I9902 | |SOC10MA2302SOCJ31| |0140 |Operation 1 | 1 | 0 | 0.0 | | 499.990 | | 9908651250| |180849518 |011255486L1 |02/08/2012 |2101 | 9901123118|56B30 |I9902 | |SOC10MA2302SOCJ31|14 |9916 |Operation 2 | 1 | 0 | 499.0 | | | | 9908532289| |181993564 |011255486L1 |02/09/2012 |2101 | 9901288820|56B30 |I9902 | |SOC10MD2302SOCJ31|14 |9916 |Operation 1 | 1 | 0 | 499.0 | | 399.599 | | 9908498544| |180885825 |011255486L1 |02/08/2012 |2101 | 9901162239|56B30 |I9902 | |SOC10MG2302SOCJ31| |0150 |Operation 3 | 1 | 0 | 0.0 | | 882.499 | | 9908099659| |180885825 |011255486L1 |02/08/2012 |2101 | 9901162239|56B30 |I9902 | |SOC10MG2302SOCJ31|14 |9916 |Operation 4 | 1 | 0 | 544.0 | | | | 9908858514| |181638583 |990104460I0 |02/10/2012 |2101 | 9902123289|56G99 |I9902 | |SOC11MAR105SOCJ31| |0160 |Operation 5 | 1 | 0 | 1,160.0 | | | | 9914295010| |181681218 |990104460B0 |02/08/2012 |2101 | 9902180981|56G99 |I9902 | |SOC11MAR328SOCJ31|0 |9910 |Operation 6 | 1 | 0 | 916.0 | | | | 9914621885| |181681036 |990104460I0 |02/09/2012 |2101 | 9902180289|56G99 |I9902 | |SOC11MAR108SOCJ31| |0180 |Operation 8 | 1 | 0 | 1.0 | | | | 9914619196| |189938054 |011255486A2 |02/10/2012 |2101 | 9999206805|5AD99 |I9902 | |RS08MJ2305SOCJ31 | |0599 |Operation 8 | 1 | 0 | 0.0 | | | | 9901316289| |181919894 |012984532A3 |02/10/2012 |2101 | 9902511433|A199399Z |I9902 | |SOC12MCB101SOCJ31|0 |9935 |Operation 9 | 1 | 0 | 0.5 | | | | 9916914233| |181919894 |012984532A3 |02/10/2012 |2101 | 9902511433|A199399Z |I9902 | |SOC12MCB101SOCJ31|22 |9951 |Operation 10 | 1 | 0 | 68.080 | | | | 9916914224| </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USPeter Mortensen
    1. USshawno
    plurals
    1. PL
      singulars
      1. LTLinked
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow can I make this PowerShell script parse large files faster?
      1. USAdam Mendoza
      1. VTFavorite
    2. VO
      singulars
      1. POHow can I make this PowerShell script parse large files faster?
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POHow can I make this PowerShell script parse large files faster?
      1. USjhclark
      1. VTFavorite
    1. COA search for "Get-Content large files" was very helpful. See http://rkeithhill.wordpress.com/2007/06/17/optimizing-performance-of-get-content-for-large-files/.
      singulars
      1. POHow can I make this PowerShell script parse large files faster?
      1. USJay Bazuzi
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload