ecb-parallel-writer

Record structural changes in a ScheduleParallel job by converting an EntityCommandBuffer to a thread-safe AsParallelWriter, using ChunkIndexInQuery as the sort key for each command to guarantee deterministic playback ordering across worker threads.

You need a chunk index sort key for EntityCommandBuffer.ParallelWriter to guarantee that recorded structural commands replay in a stable, deterministic order across multiple parallel worker threads, preventing race conditions and unpredictable state mutations.

To instantiate or destroy entities in parallel across chunks, schedule an IJobEntity or IJobChunk with ScheduleParallel, then record structural commands via an EntityCommandBuffer.ParallelWriter using AsParallelWriter and chunk index ordering for safe, deterministic replay.

Yes, you can use EntityCommandBuffer.ParallelWriter with both IJobEntity and IJobChunk scenarios scheduled with ScheduleParallel to add, remove, instantiate, destroy, or set components on entities from multiple worker threads deterministically.

Non-deterministic playback occurs when structural commands recorded from parallel worker threads lack a stable sorting mechanism, which is resolved by applying AsParallelWriter plus a ChunkIndexInQuery sort key to every ParallelWriter structural call.