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).
As people have mentioned the biggest factor here is probably your hard drive since you are loading maybe couple of 100's of small files when you load the ISE.