Ben Armstrong: I have seen a number of reviews and comments about the fact that while Hyper-V virtual machines appear to be quite fast once they are up and running - operating system installation seems to take quite a while. The reason for this is relatively easy to explain.
With Virtual Server and Virtual PC we only had emulated devices to use - and as a result we spent a lot of time optimizing and tweaking the performance of these emulated devices. When we implemented the emulated devices under Hyper-V we had to remove many of these optimizations due to the entirely different architecture of Hyper-V. We did not, however, spend much time re-optimizing the emulated devices on Hyper-V because we had the new synthetic device architecture where we have focused our attention for performance tuning.
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