qemu性能直逼VMware的仿真器QEMU 的模擬速度約為實機的 25％；約為 Bochs 的 60 倍。Plex86、User-Mode-Linux、VMware 和 Virtual PC 則比 QEMU 快一點，但 Bochs 需要特定的 Kernel Patch；User-Mode-Linux 的 Guest System 必須為 Linux；VMware 和 Virtual PC 則需要在 Guest System 上安裝特定的 Driver，且它們是針對作業系統而進行模擬，並不能說是完整的模擬器。所以 QEMU 仍不失為極優秀的 x86 模擬器。-performance almost VMware Qemu emulator QEMU is the simulation of the rate of about 25 of machines　Bochs is about 60 times. Plex86, User-Mode-Linux, VMware and Virtual PC is a little faster than QEMU, but Bochs need the specific Kernel Patch　User-Mode-Linux for the Guest System must be Linux　VMware and Virtual PC you need to install a specific Guest System the Driver, and they are carried out for operating systems simulation, and can not say that is a complete simulator. Therefore, QEMU is still very good x86 emulator.