MySQL incredibly slow on WAMP and XAMPP
When MySQL is really slow on windows (not 30ms slower) is nearly always a matter of a forgotten localhost instead of 127.0.0.1 in settings or URL. Very few times it is due to a very slow fragmented hard drive (acting slower due to windows complex ACL and parallel processes using it). MySQL is slower in some benchmarks on windows but the difference is so small that cant change your experience.