posh v2

gistfile1.txt

#v2
Measure-Command {foreach($source in $sources)
    {
    $count = 0
    foreach($allstat in $allstats)
        {
        $sourcepath = $source.path.replace('\','/')
        if($allstat.sourcefilename -like "*$sourcepath*")
            {
            $count++
            }
        }
    $array += [pscustomobject]@{count = $count; path = $source.path}
    }} 

#v3
measure-command {foreach($source in $sources)
    {
    $sourcepath = $source.path.replace('\','/')
    $count = ($allstats | ? sourcefilename -like "*$sourcepath*").count
    $array += [pscustomobject]@{count = $count; path = $source.path}
    }
    }