Is there a list or container that can add items in parallel?

I thought that this should be doable since EntityCommandBuffer.ParallelWriter can do it by using a sort key. I want the same functionality for a container.

 

What you mean by items? You mean ECS components?
There is Dynamic Buffer, to which you can set values in parallel.
I don't know what you exactly asking for.

 

How are you adding items safely to a Dynamic Buffer in parallel

Nearly every container has a parallel writer

NativeList<T>.ParallelWriter
NativeStream.ParallelWriter
NativeQueue<T>.ParallelWriter

etc

The limitation is just the capacity can't be increased in parallel, you have to pre-compute it or ensure it's large enough to put all your elements.

 

Rather add in parallel, I first set (i. E. resizeunitialised) the size of dynamic buffer in separate job. That's providing we know the required size of the buffer before hand. Or calculate needed size.

Then in next job, in parallel I can assign values to the buffer, assuming knowing appropriate indexes (no race conditions) , or run it thrugh IJobParralelFor as an example.

 

Oh, I didn't know that. That helps a lot.