Is it true that performance overhead is a necessary part of VPS technology?

There is no emulation layer, only security isolation, and all checking is done on the kernel level without context switching. This means that your private server account truly utilizes all of the processing power you purchased for each feature, application, or utility you use. In other words, your VPS account behaves just as if it were a stand-alone physical computer with the stated capabilities for your particular VPS account.

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