Powershell Get-ChildItem progress question

Question

So, I've got a set of directories 00-99 in a folder. Each of those directories has 100 subdirectories, 00-99. Each of those subdirectories has thousands of images.

What I'm attempting to do is basically get a progress report while it's computing the average file size, but I can't get that to work. Here's my current query:

get-childitem <MyPath> -recurse -filter *.jpeg | Where-Object { Write-Progress "Examining File $($_.Fullname)" true } | measure-object -Property length -Average

This shows me a bar that updates as each of the files gets processed, but at the end I get back no average file size data. Clearly, I'm doing something wrong, because I figure trying to hack the Where-Object to print a progress statement is probably a bad idea(tm).

Since there are millions and millions of images, this query obviously takes a VERY LONG time to work. get-childitem is pretty much going to be the bulk of query time, if I understand things correctly. Any pointers to get what I want? AKA, my result would ideally be:

Starting...
Examining File: \00\00\Sample.jpeg
Examining File: \00\00\Sample2.jpeg
Examining File: \00\00\Sample3.jpeg
Examining File: \00\00\Sample4.jpeg
...
Examining File: \99\99\Sample9999.jpg
Average File Size: 12345678.244567

Edit: I can do the simple option of:

get-childitem <MyPath> -recurse -filter *.jpeg | measure-object -Property length -Average

And then just walk away from my workstation for a day and half or something, but that seems a bit inefficient =/

Answer 1

Something like this?

get-childitem -recurse -filter *.exe | 
      %{Write-Host Examining file: $_.fullname; $_} | 
      measure-object -Property length -Average

Answer 2

A little more detailed progress:

$images = get-childitem  -recurse -filter *.jpeg

$images | % -begin { $i=0 } `
-process {  write-progress -activity "Computing average..." -status "Examining File: $image.fullpath ($i of $($images.count))" -percentcomplete ($i/$images.count*100); $i+=1 } `
-end { write-output "Average file size is: $($images | measure-object -Property length -Average)" }