Invoke-Parallel | Speed up PowerShell with simplified multithreading | Command Line Interface library

Found this fantastic blog post PowerShell ForEach-Object Parallel Feature by Paul Higinbotham.

From this blog post the key highlights I took away:

Script blocks run in a context called a PowerShell runspace. The runspace context contains all of the defined variables, functions and loaded modules.

As previously mentioned, the new ForEach-Object -Parallel feature uses existing PowerShell functionality to run script blocks concurrently....PowerShell itself imposes conditions on how scripts run concurrently, based on its design and history. Scripts have to run in runspace contexts and only one script thread can run at a time within a runspace. So in order to run multiple scripts simultaneously multiple runspaces must be created.

So it confirms runspaces are the main driver for this and provides some further information on threadsafe operations and more. Any prior answers or detail provided on runspaces are relevant here as this is a matured implementation of runspaces for parallel operations in the official standard library. Other implementations have been done by the community that are runspace oriented, but this is now included with no external module dependencies.

Thanks Paul for such a good contribution to the community!