Recycling Internet Explorer

Is there anything I can do to this code to optimize it to use less resources?

write-host (get-date -format s) " Beginning script..."
Add-Type -AssemblyName System.Windows.Forms
do{
    $len = [System.Windows.Forms.Screen]::AllScreens.Length;
    if($len-eq1){
        $ie = Get-Process -Name iexplore -ErrorAction SilentlyContinue
        if ($ie -ne $null){
            Write-Host (get-date -format s) "Stopping IE..."
            $ie | Stop-Process
        }
    }elseif($len-eq2){
        $ie = Get-Process -Name iexplore -ErrorAction SilentlyContinue
        if ($ie -eq $null){
            write-Host (get-date -format s) " Starting IE..."
            Start-Sleep -s 5 #5
            $ie = Open-InternetExplorer -Url http://localhost/ -Left 1366 -FullScreen -InForeground #This is an external function that works well.
            write-Host (get-date -format s) " IE Started"
        }
    }
    start-sleep -s 10
}while(1-eq1)

You should have included Open-InternetExplorer - without it, this code is incomplete and does not run.

A few of optimizations...

-
You will not need to Add-Type if all you need is the screen property. It might also make more sense to use Count rather than Length, afterall this code relies on the number of screens.

-
Unless the number of screens changes per iteration of the loop, getting this value could be taken outside the loop. Otherwise, consider a switch and remove $len altogether:

Switch ([System.Windows.Forms.Screen]::AllScreens.Count) {
   1 {
      ...
   }
   2 {
      ...
   }
}

-
The condition for the infinite loop while (1-eq1) can be simplified to avoid having to calculate a result. Use while ($true) or while (1).

-
When IE is started, the script does not use the return value so it isn't necessary to assign it to $ie:

$null = Open-InternetExplorer -Url http://...

-
The use of $ieis actually unnecessary in both cases.

The resulting script could look like:

write-host (get-date -format s) " Beginning script..."
do {
   Switch ([System.Windows.Forms.Screen]::AllScreens.Count) {
      1 {
         Get-Process -Name iexplore -ErrorAction SilentlyContinue | Stop-Process -Force
         If ($?) {
            Write-Host (get-date -format s) "Stopping IE..."
         }
      }
      2 {
         if ((Get-Process -Name iexplore -ErrorAction SilentlyContinue) -eq $null){
            write-Host (get-date -format s) " Starting IE..."
            Start-Sleep -s 5 #5
            $null = Open-InternetExplorer -Url http://localhost/ -Left 1366 -FullScreen -InForeground
            write-Host (get-date -format s) " IE Started"
         }
      }
   }
   start-sleep -s 10
} while(1)

StackExchange Code Review Q#71656, answer score: 2