I continue to meet folks who complain that their Virtual Machine performance is slow. Yes, it would be great if VMs somehow were able to self-tune the relationship between themselves and the host OS, but that's sadly not the case. When you're running an OS within and OS and maintaining a FileSystem within a FileSystem, not to mention sharing a hard drive spindle, there's lots of opportunities for
![VM Performance Checklist - Before you Complain that your Virtual Machine is Slow](https://cdn-ak-scissors.b.st-hatena.com/image/square/bae989b18126f928564b54bf29e5dc08b7643788/height=288;version=1;width=512/https%3A%2F%2Fpbs.twimg.com%2Fprofile_images%2F1133122333290291200%2FxV9gO-D6_400x400.jpg)