What are the fastest pulsars you know, and how are they related to the rotation of a neutron star?

More than 1300 pulsars have been discovered in the radio range. The overwhelming majority of them (up to 90%) have periods ranging from 0.1 to 1 s. There are pulsars with very small periods, less than 30 ms, the so-called millisecond pulsars. At the end of 1982, a millisecond pulsar with a period of 0.00155 s was discovered in the constellation Chanterelle. A rotation with such an astonishingly short period means that the star makes 645 revolutions per second. The famous pulsar in the Crab Nebula was previously designated NP 0531; it is now designated PSR J0535 + 2200 (the letter J indicates the coordinates are for the year 2000). Its period is 0.033 s. The neutron star makes 30 revolutions per second.