diff --git a/tests/perf-1.1.6.ps1 b/tests/perf-1.1.6.ps1
index c0dca92..bdbb0d9 100644
--- a/tests/perf-1.1.6.ps1
+++ b/tests/perf-1.1.6.ps1
@@ -1,11 +1,80 @@
-$func = 'https://gist.githubusercontent.com/santisq/bd3d1d47c89f030be1b4e57b92baaddd/raw/aa78870a9674e9e4769b05e333586bf405c1362c/Measure-Expression.ps1'
-Invoke-RestMethod $func | Invoke-Expression
+function Measure-Expression {
+    [CmdletBinding()]
+    [Alias('measureme', 'time')]
+    param(
+        [Parameter(Mandatory, Position = 0)]
+        [hashtable] $Tests,
+
+        [Parameter()]
+        [int32] $TestCount = 5,
+
+        [Parameter()]
+        [switch] $OutputAllTests,
+
+        [Parameter()]
+        [hashtable] $Parameters
+    )
+
+    end {
+        $allTests = 1..$TestCount | ForEach-Object {
+            foreach ($test in $Tests.GetEnumerator()) {
+                $sb = if ($Parameters) {
+                    { & $test.Value @Parameters }
+                }
+                else {
+                    { & $test.Value }
+                }
+
+                $now = [datetime]::Now
+                $null = $sb.Invoke()
+                $span = [datetime]::Now - $now
+
+                [pscustomobject]@{
+                    TestRun  = $_
+                    Test     = $test.Key
+                    TimeSpan = $span
+                }
+
+                [GC]::Collect()
+                [GC]::WaitForPendingFinalizers()
+            }
+        } | Sort-Object TotalMilliseconds
+
+        $average = $allTests | Group-Object Test | ForEach-Object {
+            $avg = [Linq.Enumerable]::Average([long[]] $_.Group.TimeSpan.Ticks)
+
+            [pscustomobject]@{
+                Test    = $_.Name
+                Average = $avg
+            }
+        } | Sort-Object Average
+
+        $average | Select-Object @(
+            'Test'
+            @{
+                Name       = "Average ($TestCount invocations)"
+                Expression = { [timespan]::new($_.Average).ToString('hh\:mm\:ss\.fff') }
+            }
+            @{
+                Name       = 'RelativeSpeed'
+                Expression = {
+                    $relativespeed = $_.Average / $average[0].Average
+                    [math]::Round($relativespeed, 2).ToString() + 'x'
+                }
+            }
+        )
+
+        if ($OutputAllTests.IsPresent) {
+            $allTests
+        }
+    }
+}
 
 $modulePath = Convert-Path $PSScriptRoot\..\output\PSADTree
 
-Measure-Expression @{
-    'v1.1.6-pwsh-7'   = { pwsh -File $PSScriptRoot\perfCode.ps1 $modulePath }
-    'v1.1.6-pwsh-5.1' = { powershell -File $PSScriptRoot\perfCode.ps1 $modulePath }
-    'v1.1.5-pwsh-7'   = { pwsh -File $PSScriptRoot\perfCode.ps1 PSADTree }
-    'v1.1.5-pwsh-5.1' = { powershell -File $PSScriptRoot\perfCode.ps1 PSADTree }
+Measure-Expression -TestCount 5 @{
+    'PSADTree v1.1.6-pwsh-7'   = { pwsh -File $PSScriptRoot\perfCode.ps1 $modulePath }
+    'PSADTree v1.1.6-pwsh-5.1' = { powershell -File $PSScriptRoot\perfCode.ps1 $modulePath }
+    'PSADTree v1.1.5-pwsh-7'   = { pwsh -File $PSScriptRoot\perfCode.ps1 PSADTree }
+    'PSADTree v1.1.5-pwsh-5.1' = { powershell -File $PSScriptRoot\perfCode.ps1 PSADTree }
 }
diff --git a/tests/perfCode.ps1 b/tests/perfCode.ps1
index 0c219fe..dea448a 100644
--- a/tests/perfCode.ps1
+++ b/tests/perfCode.ps1
@@ -5,7 +5,6 @@ Import-Module $pathOrName
 Write-Host "Running PSADTree v$((Get-Module PSADTree).Version)"
 
 $objects = Get-ADObject -LDAPFilter '(|(objectClass=group)(objectClass=user))'
-0..3 | ForEach-Object {
-    $objects | Where-Object ObjectClass -EQ group | Get-ADTreeGroupMember -Recursive -ShowAll
-    $objects | Get-ADTreePrincipalGroupMembership -Recursive -ShowAll
-}
+$objects = 0..15 | ForEach-Object { $objects }
+$objects | Where-Object ObjectClass -EQ group | Get-ADTreeGroupMember -Recursive -ShowAll
+$objects | Get-ADTreePrincipalGroupMembership -Recursive -ShowAll