Thanks to @korinocho for bringing these performance issues to my attention.I realized with his server's use case, that my initial MySQL implementation was faulty (and most likely contained memory leaks).

With this update, I've refactored the MySQL implementation to leverage HikariCP for building out a proper connection pool, addressed unclosed connections, statements and results and even fixed a small bug with the UpdateChecker implementation as well.

Thanks to @korinocho for help with testing these changes on his server. He was able to provide these screenshots showing the performance before (version 2.8.11) and after (version 2.8.12):

BEFORE



AFTER