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What is the main difference between emulation and virtualization? Which one is slower?

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Emulation means to make a software that functions like any software for real work. With Emulation a hardware component is replaced by a software-based construct. On an emulated server, a complete virtual machine can run.

With Virtualization, a complete virtual machine can run directly on the underlying hardware without replacing it.

Emulation

Virtualization

  • Emulation means to make a software that functions like any software for real work. With Emulation a hardware component is replaced by a software-based construct. On an emulated server, a complete virtual machine can run.
  • With Emulation, the processing cycles needed to emulate the hardware.
  • Running an operating system meant for other hardware (e.g. console-based games on a computer)
  • Running software meant for another operating system (running Mac-specific software on a PC and vice versa)
  • Running legacy software after comparable hardware become obsolete.
  • It is slower as compared to Virtualization.
  • With Virtualization, a complete virtual machine can run directly on the underlying hardware without replacing it.
  • With Virtualization, no such emulation tax is needed to impose.
  • Wide compatibility with existing x86 CPU architecture
  • Ability to appear as physical devices to all hardware and software
  • Self-contained in each instance
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