Performance of microkernel vs monolithic kernel. As is always the answer (or at least the preface) to performance-related questions: know your problem domain, run comparative benchmarks, and remember what premature optimization is.
A summary of the difference between contactors, motor starters, relays and circuit breakers. Switches, circuit breakers, and contactors are used to control what parts of an electrical system are energized or de-energized. Fuses are used to protect the electrical system when something goes wrong, and can isolate the faulted parts from the normal parts.
Similar to a fuse, a circuit breaker is used to protect the electrical system of a particular house or building. An overload of electrical flow can happen sometimes and if you do not have something installed to protect you from this sudden surge of electricity, you might end up with damaged appliances and other sensitive electronic equipment.