PowerShell Challenge – Beating Hadoop with Posh

gistfile1.txt

<#
    http://foxdeploy.com/2016/03/01/powershell-challenge-beating-hadoop-with-posh/
    9m 25s 643ms on my machine, Core i5-2500K @ 3.30Ghz
    Only uses a single core so there is much room to improve.

    Update $Path to point to the folder containing the folders of .pgn files.

    Change "select -First 10" to "select -First 1" for quick test runs.
#>

$Path = 'V:\ChessData Project\ChessData-master\ChessData-master'
Set-Location -Path $Path

Measure-Command -Expression {
    [int]$W = 0
    [int]$B = 0
    [int]$D = 0
    Get-ChildItem -Directory | sort Name | select -First 10 | % {
        Get-ChildItem -Path $_.FullName -File -Filter *.pgn  | % {
            Write-Verbose "$($_.FullName) $($($_.length)/1MB)" -Verbose
            $CurrentFile = New-Object System.IO.StreamReader($_.FullName)
            while (($CurrentLine = $CurrentFile.ReadLine()) -ne $null) {
            if ($CurrentLine -match 'result'){
                $M = (($CurrentLine -split '-')[0]).ToString()[-1] 
                if($M -eq '2'){$D++}elseif($M -eq '1'){$B++}elseif($M -eq '0'){$W++}
                }
            }
            $CurrentFile.Close()
        }
    }
    $Result = [pscustomobject]@{
        White = $W
        Black = $B
        Draw = $D
        }
}
$Result