[Burst compile] and nested job structs.

[Spy-Master]

Just FYI, current versions of Entities don’t mandate BurstCompile on the ISystem struct when you’re writing Burst-compiled callbacks like OnCreate/OnDestroy/OnUpdate.

Jobs require BurstCompile to be declared on the struct. It shouldn’t be inferred from any containing type.

Also worth a read:

When, where, and why to put [BurstCompile], with mild under-the-hood explanation

People are very often confused about where they should put [BurstCompile], and what gets bursted when they put it where, so I figured I'd write something up explaining everything in one place. The first two things to know, from which all else flows, but seems a bit surprising at first: 1. Burst can only ever burst static methods, period, end of story. If you want this to happen outside of the special cases outlined below, just put [BurstCompile] on a static method and on its declaring type.* …