Performance issues with PreSpawnerSpawnEvent

[JPlayer3]

BkCommonLib version: v1.17.1-v5-SNAPSHOT

Paper version: paper-287

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Problem or bug:

After starting the server, I left it as it was and measured it.

[bergerkiller]

Given it fired 2.2 million times in that period, it seems kind of low? I think you're mostly measuring the overhead of timings itself, since every call a tiny bit of time is lost executing nanoTime(), which during normal operation doesn't happen.

That said though, it's possible to detect whether anyone is actually using that event (normally only when MyWorlds is installed) and turn off the event entirely if nobody is.