TestTlsPerf.ps1

# Using curl to measure TLS negotiation time, as a proxy of PKCS #11 performance
# https://blog.cloudflare.com/a-question-of-timing/

function Get-ConnectionTimes ([string] $Uri) {
    $curl = curl -w "%{time_namelookup},%{time_connect},%{time_appconnect}\n" -s -o /dev/null $Uri
    $namelookup,$connect,$appconnect = $curl -split ","
    $res = [PSCustomObject]@{
        namelookup = [float]$namelookup
        connect = [float]$connect
        appconnect = [float]$appconnect
    }
    return $res
}

function Get-TLSHandshakeTime ([string] $Uri) {
    $res = Get-ConnectionTimes $Uri
    return $res.appconnect - $res.connect
}

# Example
1..20 | % {Get-ConnectionTimes "https://www.googleapis.com"}