Use the job system with Entities

The Entities package uses the C# Job System extensively. Whenever possible, you should use jobs in your system code.

For main thread access, you can use C# foreach over the Query objects in SystemAPI. For convenient job scheduling, you can use IJobEntity. In niche situations, or when you want manual control, you can use IJobChunk's Schedule() and ScheduleParallel() methods, to transform data outside the main thread.

When you schedule jobs, ECS keeps track of which systems read and write which components. Later systems' Dependency property will include the job handles of earlier systems' scheduled jobs, in cases where the set of components read and written overlap.

For more information about systems, see System concepts.