*check-dns.ps1* ================ This PowerShell script measures and prints the DNS resolution speed by using 200 popular domains. Parameters ---------- ```powershell PS> ./check-dns.ps1 [] [] This script supports the common parameters: Verbose, Debug, ErrorAction, ErrorVariable, WarningAction, WarningVariable, OutBuffer, PipelineVariable, and OutVariable. ``` Example ------- ```powershell PS> ./check-dns ✅ DNS resolves 156.5 domains per second ``` Notes ----- Author: Markus Fleschutz | License: CC0 Related Links ------------- https://github.com/fleschutz/PowerShell Script Content -------------- ```powershell <# .SYNOPSIS Check DNS resolution .DESCRIPTION This PowerShell script measures and prints the DNS resolution speed by using 200 popular domains. .EXAMPLE PS> ./check-dns ✅ DNS resolves 156.5 domains per second .LINK https://github.com/fleschutz/PowerShell .NOTES Author: Markus Fleschutz | License: CC0 #> try { Write-Progress "⏳ Resolving 200 popular domain names..." $table = Import-CSV "$PSScriptRoot/../Data/popular-domains.csv" $numRows = $table.Length $stopWatch = [system.diagnostics.stopwatch]::startNew() if ($IsLinux) { foreach($row in $table){$nop=dig $row.Domain +short} } else { foreach($row in $table){$nop=Resolve-DNSName $row.Domain} } [float]$elapsed = $stopWatch.Elapsed.TotalSeconds $average = [math]::round($numRows / $elapsed, 1) if ($average -lt 10.0) { "⚠️ DNS resolves $average domains per second only!" } else { "✅ DNS resolves $average domains per second" } Write-Progress -completed "." exit 0 # success } catch { "⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])" exit 1 } ``` *(generated by convert-ps2md.ps1 using the comment-based help of check-dns.ps1 as of 07/29/2023 10:33:43)*