How to pass a lookup table in all jobs within an update function?

Hi all,
I tried to find a proper question throughout the Internet, but so far cannot find it.

I have a big lookup table LUT (~100k elements) generated in the very beginning of my unity simulation. My parallelfor loops should read some chunks of this table during each update. The question is how to organize a nativearray to be accessible from different jobs, and then dispose it at the very end of the simulation.

If I assign nativearrays based on the LUT every update, it takes too much time. Is it possible to create a nattivearray NALUT that consists of all elements from the LUT once and access it as many times as required? Thanks in advance!

The code below shows my procedure of copying LUT into NALUT. Unfortunately, it takes a couple of milliseconds.

Code (CSharp):

1. NativeArray<T> NALUT= new NativeArray<T>(LUT.Count, Allocator.TempJob);
2. NativeArray<Vector2Int> NALUTIndexes = new NativeArray<Vector2Int>(LUTIndexes.Count, Allocator.TempJob); // LUTIndexes show edges of chunks, which are not overlapping
3. for (int i = 0; i < LUT.Count; i++)
4. { NALUT[i] = LUT[i];}
5. for (int i = 0; i < LUTIndexes.Count; i++)
6. { NALUTIndexes[i] = LUTIndexes[i];}
7.  
8. NALUT.Dispose();
9. NALUTIndexes.Dispose();

 

Can't you make your NALUT array persistent and only create it when you create LUT?

 

If I do this, how to properly dispose NALUT? It is continuously used in Update and should be disposed after simulation stops.

 

If you keep the collection on a Monobehaviour, you can dispose it on OnDestroy or OnDisable (make sure to check NALUT.iscreated), if you keep in on a SystemBase OnStopRunning should do it