powshell get-content testing

# http://keithhill.spaces.live.com/blog/cns!5A8D2641E0963A97!756.entry
cls
cd "C:\archived\self\task\powershell\test"
$file ="C:\archived\self\task\powershell\test\12.3MB.txt"
$file
function ReadCount
{
   $ht = @{};
   for ($i = 1; $i -le 10MB; $i *= 10)
   {
      #write-progress "Measuring gc -readCount $i" "% Complete" -perc ([math]::log10($i)*100/[math]::log10(10MB))
      $ts = measure-command { gc $file  -read $i | %{$_} }
      $ht[$i] = $ts
   }
   $ht.Keys |  sort |select @{n='ReadCount';e={$_}}, @{n='ElapsedTime';e={$ht[$_].ToString()}} | ft -a
}

function f1
{
    Get-Content $file
}

function f2
{
    switch -regex -file ($file) {default {}}
}

function f3
{
   Invoke-Expression "`${$file}"
}

function f4
{
    [System.IO.File]::ReadAllLines($file)    
}

function MeasereGetContent
{
   # measure
   (measure-command {f1}).ToString()#.TotalMilliseconds
   (measure-command {f2}).ToString()#.TotalMilliseconds
   (measure-command {f3}).ToString()#.TotalMilliseconds
   (measure-command {f4}).ToString()#.TotalMilliseconds
}
function CombineFile
{
   gc $file -ReadCount 10000 |Add-Content addContentTesting.txt -Encoding Ascii
}

function GetCountOfFile
{
   gc $file -ReadCount 10000 |%{$count=0} {$count+=$_.count} {$count}
}

function directory-summary($dir=".") { 
  get-childitem $dir | 
    % { $f = $_ ; 
        get-childitem -r $_.FullName | 
           measure-object -property length -sum | 
             select @{Name="Name";Expression={$f}},Sum}
}
#ReadCount
#MeasereGetContent
#CombineFile
#(measure-command { gc $file  -read 2 | %{$_} }).ToString()
#(measure-command { gc $file  | %{$_} }).ToString()
#(measure-command{GetLastLines}).ToString()

#GetCountOfFile
#(measure-command{GetCountOfFile}).ToString()

#$A=select-string "C:\archived\self\task\powershell\test\984MB.txt"  -pattern  "007924AF0"
#(measure-command{$A=select-string "C:\archived\self\task\powershell\test\984MB.txt"  -pattern  "007924AF0"}).ToString()