“PSR J1748−2446ad is the fastest-spinning pulsar known, at 716 Hz (times per second), or 43,000 revolutions per minute.”
Not fast as far as computers are concerned but I wondered if there are any technologies that somehow read and make use of pulsar signals?
"To find this mysterious hum, astronomers have been tracking rapidly rotating neutron stars called pulsars that blast out light with extreme regularity. By looking at different pulsars across the Milky Way, astronomers can effectively use them as a galaxy-sized gravitational-wave detector called a pulsar timing array."