Well, there is a little bit of emulation. We have to encode and handle Linux-style file permissions, which has some overhead. We are working on making both the

Well, there is a little bit of emulation. We have to encode and handle Linux-style file permissions, which has some overhead. We are working on making both the WSL layer and NTFS itself better. For example, in the upcoming Windows release, we have created a fast path for stat that should yield a modest speed improvement. We have a lot more work to do, though.