This might be the most exciting news I've heard in a long time. Being able to use Visual Studio and .NET for web development while using zsh and all the other Linux tools? Dreamland.
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I was also running into Haskell compilation problems that were fixed by running Ubuntu in a Vagrant environment but speed was slow. There isn't good NFS support on Windows either (there is some).
On my i5-3550 with 16 GB of RAM and an SSD it takes a couple seconds to start the first time and less than a second for subsequent times.
Both machines are running Windows 10.
Right now, the machine with the spinning rust is loading a bunch of files with an I/O priority of "background" because it just got booted into Windows; that might slow it down a bit because of the seek times and I don't know if Windows is willing to starve background I/O for seconds at a time to speed up interactive requests (I doubt it).
Update: once all the background preloading is done, PowerShell restarts in three seconds on the spinning-rust machine.
Long story short, I think getting an SSD will be the thing that makes PowerShell start acceptably fast.
Left click in fwvm, select xterm, window appears in less than my blink response time.
Seriously: I think I might pop Win10 on an old Dell i5 that came with Win7 and play with this.
Jeffrey Snover [MSFT]