Reuse a dynamic buffer for multiple entities

If all entities of an IJobEntity need the same buffer, you can get that buffer as a local variable on the main thread before scheduling the job.

The following code example shows how to use the same dynamic buffer for multiple entities. It assumes a dynamic buffer called MyElement exists and another component exists called OtherComponent.

public void DynamicBufferExample(Entity e)
{
    var myBuff = SystemAPI.GetBuffer<MyElement>(e);
    new MyJobEntity{MyBuffer  = myBuf}.Schedule();
}
Note

If you use ScheduleParallel, you can't write to the dynamic buffer in parallel. Instead, you can use an EntityCommandBuffer.ParallelWriter to record changes in parallel. However, any structural changes invalidate the buffer.

Additional resources