Found this plugin while looking for a solution to the performance issues of the YanFly EventSpawner.
With this plugin, my game has been spawning / destroying events for a minute before performance started to go down. I don't know if I'm doing something wrong, I'm just using spawnEvent ( no saving ) and unspawnEvent when the event hits a certain region. There are at best 40 events moving on the map simultaneously, rest are unspawned. I don't see why performance would degrade over time.
Also, this plugin is not compatible with RPG Maker MV < 1.6 ( has to do with node js version ).