1- Which freeware or open source emulator application is the fastest?
QEMU? Xen? VMWare? VirtualBox? ...
2- Does the host OS's abilities and performance affect the emulator's abilities and performance?
for example, if host OS does not have USB support, can emulator app. provide USB support to guests? (I know it sounds absurd, but it came into my mind
3- Will there be a speed difference if I run QEMU or another emulator under tiny sized distros like DSL, Puppy vs bigger distros like Ubuntu, Fedora, Slackware...?
Many thanks for your opinions and valuable help.