Process creation on Windows has always been significantly slower than Unix. That is why PowerShell is skewed towards "built-ins" vs launched applications. The ramification of that is slower startup times.

Interesting note - it is also the reason why PowerShell was able to adopt the more natural Verb-Noun model for cmd naming. In Unix, this would produce a huge # of files OR and you couldn't do "VERB NOUN" because then you would have to multiplex on the VERB. Unix's "NOUN VERB" is the result.

BTW - VMS DCL stepped on all these rakes which is why it is have VERB/NOUN and half NOUN/VERB. A complete mess.

Jeffrey Snover [MSFT]