performance - 需要更快地在 PowerShell 脚本中进行搜索

Question

谁能帮助加快搜索速度？使用此代码，搜索需要几天时间。

Search_Names.csv（大约 10k 个名字）

Need_This_Long_Strings.csv（大约 180k 个字符串，它是 50MB）

$TimeStamp = Get-Date -Format {yyyy.MM.dd_hh.mm.ss}
$SearchNames = gc D:\Search_Names.csv
$WhereSearch = gc D:\Need_This_Long_Strings.csv
$Val = 0
 
foreach ($SearchName in $SearchNames)
{
       $WhereSearch | Where{$_ | Select-String -Pattern "$SearchName.*"} | Out-File D:\Find_in_Search_File_$TimeStamp.log -Append
       $Val = $Val + 1
}
"Count of matches - $Val" |Out-File D:\Find_in_Search_File_$TimeStamp.log -Append

Answer 1

我自己找到了解决方案。刚刚将数据（Need_This_Long_Strings.csv）制作成一个数组。现在这个代码搜索大约需要 20 分钟。

$TimeStamp = Get-Date -Format {yyyy.MM.dd_hh.mm.ss}
$SearchNames = Get-Content D:\Search_Names.csv
$WhereSearch = Import-Csv D:\Need_This_Long_Strings.csv -Delimiter ";"
$SearchArray = New-Object System.Collections.ArrayList($null)
$SearchArray.AddRange($WhereSearch)
$Val = 0

foreach ($_ in $SearchArray)
{
       if ($SearchNames -contains $_.FullName)
       {
             $_ | Export-Csv D:\Find_in_Search_File_$TimeStamp.csv -Delimiter ";" -Append
             $Val = $Val + 1
       }
}
"Count of matches - $Val" |Out-File D:\Find_in_Search_File_$TimeStamp.log -Append