Accumulating Output in a Function

PowerShell commands should usually output each object to the pipeline, one at a time, as those objects are ready. That allows the pipeline to accumulate the output, and to immediately pass it along to whatever is next in the pipeline. That’s how PowerShell commands are intended to work. Now, there are always exceptions. Sort-Object, for example, has to accumulate its output, because it can’t actually sort anything until it has all of them. So it’s called a _blocking command, _because it “blocks” the pipeline from doing anything else until it produces its output. But that’s an exception.