Benchmark cygwin mirrors.

readme.md

Benchmark cygwin mirrors

This script can determine the best mirror of cygwin before installing cygwin.

Below oneliner downloads and executes benchmark_cygwin_mirrors.bat.

powershell -Command "Import-Module BitsTransfer; Start-BitsTransfer https://gist.githubusercontent.com/kou1okada/9581971e32cadc6306fc/raw/benchmark_cygwin_mirrors.bat" && benchmark_cygwin_mirrors.bat

Below is an example of the result.

>powershell -Command "Import-Module BitsTransfer; Start-BitsTransfer https://gist.githubusercontent.com/kou1okada/9581971e32cadc6306fc/raw/benchmark_cygwin_mirrors.bat" && benchmark_cygwin_mirrors.bat
Benchmark cygwin mirrors.
0.3449061 http://mirrors.neusoft.edu.cn/cygwin/
Update the best: 0.3449061 http://mirrors.neusoft.edu.cn/cygwin/
0.2414021 http://mirrors.ustc.edu.cn/cygwin/
Update the best: 0.2414021 http://mirrors.ustc.edu.cn/cygwin/
0.1870961 ftp://ftp.iij.ad.jp/pub/cygwin/
Update the best: 0.1870961 ftp://ftp.iij.ad.jp/pub/cygwin/
0.0369863 http://ftp.iij.ad.jp/pub/cygwin/
Update the best: 0.0369863 http://ftp.iij.ad.jp/pub/cygwin/
0.6265428 http://ftp-stud.hs-esslingen.de/pub/Mirrors/sources.redhat.com/cygwin/

0.5858283 http://sourceware.mirrors.tds.net/pub/sourceware.org/cygwin/

The best mirror is 0.0369863 http://ftp.iij.ad.jp/pub/cygwin/

benchmark_cygwin_mirrors.bat

@ECHO OFF
ECHO Benchmark cygwin mirrors.
powershell -Command ^
"^
  $len = 0;^
  $min = 1e9;^
  $best = """nothing""";^
  Import-Module BitsTransfer;^
  Start-BitsTransfer https://cygwin.com/mirrors.lst;^
  foreach($mirror in Get-Content mirrors.lst) {^
    $mirror = $mirror -split """;""";^
    $bz2 = """$($mirror[0])x86_64/sha512.sum""";^
    try {^
      $dur = (Measure-Command {^
        $req = [System.Net.WebRequest]::Create($bz2);^
        $req.Timeout = 1000;^
        $res = $req.getResponse();^
      }).TotalSeconds;^
      $progress = """$dur $($mirror[0])""";^
      Write-Host -NoNewLine """`r$(""" """ * $len)`r$($progress)""";^
      $len = $progress.Length;^
      if ($dur -lt $min) {^
        $min = $dur;^
        $best = $mirror[0]; Write-Host """`nUpdate the best: $min $best""";^
      }^
    }^
    catch [Exception] { }^
  };^
  Write-Host; Write-Host """`nThe best mirror is $min $best""";^
"