Get-ChildItem高内存使用率

Question

我想扫描一些具有数百万个文件的大型目录，以递归汇总第二级目录名称，大小和文件数的摘要。我将代码运行了几个小时，但是由于PowerShell消耗了13GB内存，它被卡在了中间。知道为什么内存使用率如此之高吗？

$mailboxes = Get-ChildItem E:\data -Directory |
             Get-ChildItem -Directory |
             Select -ExpandProperty FullName

foreach ($line in $mailboxes) {
    $s = $line.split("\\")
    $files = Get-ChildItem $line -File -Recurse -Include *.eml
    $mailbox_path = $line
    $mailbox = $s[-1]
    $size = $files | Measure-Object Length -Sum | select -ExpandProperty Sum
    $count = $files.Count
    "$mailbox_path`t$mailbox`t$size`t$count" |
        Out-File 'D:\scripts\summary.txt' -Append
}

Answer 1

看看这是否更好

$mailboxes = Get-ChildItem E:\data -Directory | Get-ChildItem -Directory
$OutputPath = 'D:\scripts\summary.csv'

foreach($line in $mailboxes) {

$files = Get-ChildItem $line.FullName -File -Recurse -Filter *.eml
$size = $files | Measure-Object Length -Sum | select -ExpandProperty Sum


[pscustomobject]@{MailBoxPath = $line.FullName;MailBox = $line.BaseName;FileSize = $size;FileCount = $files.count} | Export-Csv -Path $OutputPath -NoTypeInformation -Append
}