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39 lines
1.1 KiB
PowerShell
Executable File
39 lines
1.1 KiB
PowerShell
Executable File
<#
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.SYNOPSIS
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Check DNS resolution
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.DESCRIPTION
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This PowerShell script measures and prints the DNS resolution speed by using 200 popular domains.
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.EXAMPLE
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PS> ./check-dns.ps1
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✅ DNS resolves 156.5 domains per second
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.LINK
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https://github.com/fleschutz/PowerShell
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.NOTES
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Author: Markus Fleschutz | License: CC0
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#>
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try {
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Write-Progress "⏳ Resolving 200 popular domain names..."
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$table = Import-CSV "$PSScriptRoot/../Data/popular-domains.csv"
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$numRows = $table.Length
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$stopWatch = [system.diagnostics.stopwatch]::startNew()
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if ($IsLinux) {
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foreach($row in $table){$nop=dig $row.Domain +short}
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} else {
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foreach($row in $table){$nop=Resolve-DNSName $row.Domain}
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}
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Write-Progress -completed "."
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[float]$elapsed = $stopWatch.Elapsed.TotalSeconds
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$average = [math]::round($numRows / $elapsed, 1)
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if ($average -lt 10.0) {
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Write-Output "⚠️ DNS resolves $average domains per second only"
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} else {
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Write-Output "✅ DNS resolves $average domains per second"
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}
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exit 0 # success
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} catch {
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"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
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exit 1
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}
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