 Using a more pragmatic approach to the problem, including assembly code and relying on the processor to enforce concepts normally supported in software led to a new series of microkernels with dramatically improved performance.Microkernels are closely related to exokernels.They also have much in common with hypervisors,
but the latter make no claim to minimality and are specialized to supporting virtual machines; indeed, the L4 microkernel frequently finds use in a hypervisor capacity.