Virtualization has become so widely accepted that for many companies it is a strategic mandate. The use of dedicated physical servers requires an exception if they are allowed at all. Qlik products have been shown to run very well on virtualized environments. Both Amazon and VMware virtualized environments have been tested with good performance. As with any additional layer between software and hardware, some performance degrade is introduced. Measured values show that average response times are from a few percent to about twenty percent slower in general for virtualized, whitelisted, well performing hardware. Not adhering to best practices will likely increase any degrade in performance.
The attached paper summarises some key consideration when deploying QlikView or Qlik Sense in virtual environments.