For simple matches against one pattern, you may prefer...
> ls -rec . -filter *substring*`
... as filtering can be offloaded to the "provider" when Get-ChildItem (ls) knows about it.
Even if the filesystem provider doesn't handle patterns any differently from Where-Object (?), you can save the cost of hydrating FileInfo objects only to query and discard most of them.
For multiple patterns or anything that you'd need a regular expression for, Where-Object is superior!
Thanks, I'm not usually doing performance required stuff but when I write a function I always want to know the best way to feed the pipeline, I appreciate it. #snoverville
