Using this method my Get-user went from 86 seconds down to 0.0009 seconds the second time around.
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if (-not $CashedQuerys) { $CashedQuerys = @{} } function Cached-Get-ADUser { [CmdletBinding()] param( [Parameter(Mandatory = $false, Position = 0)] #[ValidateNotNullOrEmpty()] [Alias('ID','Alias', 'DistinguishedName', 'Guid', 'PrimarySmtpAddress', 'SamAccountName')] [string]$Identity, [Parameter(Position = 1)] [ValidateSet('Negotiate', 'Baisc')] [string]$AuthType = 'Negotiate', [Parameter()] [System.Management.Automation.PSCredential]$Credential = $null, [Parameter()] [string]$Partition, [Parameter()] [string]$Properties, [Parameter()] [string]$Server = $null, [Parameter()] [string]$Filter, [Parameter()] [int]$ResultSetSize, [Parameter()] [string]$SearchBase, [Parameter()] [ValidateSet($null, 'Base', 'OneLevel', 'SubTree')] [string]$SearchScope = $null, [Parameter()] [ValidateSet($false, $true)] [string]$SetInsteadofGetCache = $false ) $Parameters = @{ Identity = $Identity AuthType = $AuthType Credential = $Credential Partition = $Partition Properties = $Properties Server = $Server Filter = $Filter ResultSetSize = $ResultSetSize SearchBase = $SearchBase SearchScope = $SearchScope } #Get-ADUser @Parameters $start = Get-Date $filteredParameters = @{} foreach ($key in $Parameters.Keys) { $value = $Parameters[$key] if ($value -ne $null -and $value -ne '') { $filteredParameters.Add($key, $value) } } $GeneratedJSON = $filteredParameters | ConvertTo-Json #$hash = ($GeneratedJSON | ConvertTo-SecureString -AsPlainText -Force | Get-Hash -Algorithm SHA256).Hash $hasher = [System.Security.Cryptography.HashAlgorithm]::Create('sha256') $hash = $hasher.ComputeHash([System.Text.Encoding]::UTF8.GetBytes($GeneratedJSON)) $hashString = [System.BitConverter]::ToString($hash).Replace('-', '') if ($SetInsteadofGetCache -eq $false) { if ( $CashedQuerys.ContainsKey($hashString) ) { $end = Get-Date $time = ($end - $start).TotalMilliseconds write-host "Cashed Result returned in: " $($time / 1000 / 60) $($GeneratedJSON.Replace("`n", '')) return $CashedQuerys.Item($hashString) } } #The command below flattens the hashtable to an array and slatting does not work as expected. #$Parameters = $Parameters.GetEnumerator() | Where-Object { $_.Value -ne $null -and $_.Value -ne '' } #Splatting $Result = Get-ADUser @filteredParameters if ($CashedQuerys.ContainsKey($hashString)) { $CashedQuerys.Item($hashString) = $Result } else { $CashedQuerys.Add($hashString, $Result) } $end = Get-Date $time = ($end - $start).TotalMilliseconds write-host "Result returned in: " $($time / 1000 / 60) $($GeneratedJSON.Replace('`n', '')) return $Result } #Get-Item Function:Get-ADUser | Select-Object -ExpandProperty Definition #$test = Get-ADUser -Identity EID #PS P:\> $test.GetType() #IsPublic IsSerial Name BaseType #-------- -------- ---- -------- #True False ADUser Microsoft.ActiveDirectory.Management.ADAccount #[Microsoft.ActiveDirectory.Management.ADAccount] | gm $First = Cached-Get-ADUser -Filter * $Second = Cached-Get-ADUser -Identity EID #$First = Cached-Get-ADUser -Filter * -SetInsteadofGetCache True $First = Cached-Get-ADUser -Filter * write-host $First.Count $Second.Name exit #There is an issue here where a new query created at a later time could have a different result set. This can only work with testing? |