#requires -RunAsAdministrator

param(

$ETLFileName = '.\PerfViewData.etl',

[Parameter(Mandatory)]

[scriptblock]

$ScriptBlock,

$LogFileName = '.\perfview.log',

$PowerShellPath = $(Get-Command -Name pwsh.exe).Source,

$PerfViewPath = $(Get-Command -Name PerfView.exe).Source

)

$EncodedScriptBlock = [System.Convert]::ToBase64String([System.Text.Encoding]::UNICODE.GetBytes($ScriptBlock.ToString()))

$perfViewArgs = @(

'/AcceptEula'

'/ThreadTime'

"/LogFile=$LogFileName"

"/DataFile:$ETLFileName"

'/noRundown'

'/Merge'

'/Zip:False'

# GCSampledObjectAllocationHigh is sometimes useful, but quite expensive so not included by default

# '/ClrEvents=default+GCSampledObjectAllocationHigh'

'/Providers:*Microsoft-PowerShell-Runspaces,*Microsoft-PowerShell-CommandDiscovery,*Microsoft-PowerShell-Parser,*Microsoft.Windows.PowerShell'

'run'

"""$PowerShellPath"""

'-NoProfile'

'-EncodedCommand'

$EncodedScriptBlock

)

$process = Start-Process -FilePath $PerfViewPath -ArgumentList $perfViewArgs -PassThru

$process.WaitForExit()

Get-Content $LogFileName | Out-Host