如何使Powershell更快地parsingXML或进一步优化我的脚本？

我有一个包含700万个XML文件的设置，大小从几KB到多MB不等。 总而言之，这大概是180GB的XML文件。 我需要执行的工作是分析每个XML文件，并确定文件是否包含string<ref> ，并且如果不将它移出当前包含在Referenceless文件夹中的Chunk文件夹。

我创build的脚本效果不错，但对于我的目的来说，速度非常慢。 预计在24天内完成对所有700万个文件的分析，每秒处理大约3个文件。 有什么我可以在我的脚本中改变，以消除更多的performance？

此外，为了使事情更加复杂，我没有在我的服务器上运行.PS1文件的正确权限，所以脚本需要能够通过一个命令从PowerShell运行。 如果我有权限，我会设置权限。

 # This script will iterate through the Chunk folders, removing pages that contain no # references and putting them into the Referenceless folder. # Change this variable to start the program on a different chunk. This is the first # command to be run in Windows PowerShell. $chunknumber = 1 #This while loop is the second command to be run in Windows PowerShell. It will stop after completing Chunk 113. while($chunknumber -le 113){ #Jumps the terminal to the correct folder. cd C:\Wiki_Pages #Creates an index for the chunk being worked on. $items = Get-ChildItem -Path "Chunk_$chunknumber" echo "Chunk $chunknumber Indexed" #Jumps to chunk folder. cd C:\Wiki_Pages\Chunk_$chunknumber #Loops through the index. Each entry is one of the pages. foreach ($page in $items){ #Creates a variable holding the page's content. $content = Get-Content $page #If the page has a reference, then it's echoed. if($content | Select-String "<ref>" -quiet){echo "Referenced!"} #if the page doesn't have a reference, it's copied to Referenceless then deleted. else{ Copy-Item $page C:\Wiki_Pages\Referenceless -force Remove-Item $page -force echo "Moved to Referenceless!" } } #The chunk number is increased by one and the cycle continues. $chunknumber = $chunknumber + 1 } 

我对PowerShell知之甚less，昨天是我第一次打开这个程序。

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 PS> grep [0-9] numbers.txt | wc -l > $null CMD> cmd /c "grep [0-9] numbers.txt | wc -l > nul" 

 PS C:\temp> 1..5 | % { .\perf.ps1 ([Math]::Pow(10, $_)) } 10 iterations 30 ms ( 0 lines / ms) grep in PS 15 ms ( 1 lines / ms) grep in cmd.exe 100 iterations 28 ms ( 4 lines / ms) grep in PS 12 ms ( 8 lines / ms) grep in cmd.exe 1000 iterations 147 ms ( 7 lines / ms) grep in PS 11 ms ( 89 lines / ms) grep in cmd.exe 10000 iterations 1347 ms ( 7 lines / ms) grep in PS 13 ms ( 786 lines / ms) grep in cmd.exe 100000 iterations 13410 ms ( 7 lines / ms) grep in PS 22 ms (4580 lines / ms) grep in cmd.exe 

 $content = [xml](Get-Content $page) #If the page has a reference, then it's echoed. if($content.SelectSingleNode("//ref") -quiet){echo "Referenced!"}