How to turn this loop into a job?

I'm trying to add multithreading to my game as it's suffering from some performance issues by turning all of the loops into jobs, but I can't figure out how to actually do it. I tried everything I could think of. How would I turn this loop into a job?

Code (CSharp):

1. for (int i = 0; i < chunkPositions.Length; i++) {
2.     //translate the player position and array position into chunk position
3.     WorldPos newChunkPos = new WorldPos(
4.         chunkPositions[i].x * Chunk.chunkSize + playerPos.x,
5.         0,
6.         chunkPositions[i].z * Chunk.chunkSize + playerPos.z
7.         );
8.  
9.     //Get the chunk in the defined position
10.     Chunk newChunk = world.GetChunk(
11.         newChunkPos.x, newChunkPos.y, newChunkPos.z);
12.  
13.     //If the chunk already exists and it's already
14.     //rendered or in queue to be rendered continue
15.     if (newChunk != null
16.         && (newChunk.rendered || updateList.Contains(newChunkPos)))
17.         continue;
18.  
19.     //load a column of chunks in this position
20.     for (int y = -4; y < 4; y++) {
21.         buildList.Add(new WorldPos(newChunkPos.x, y * Chunk.chunkSize, newChunkPos.z));
22.     }
23.     return;
24. }

The latest error I got was "findChunkJob.world is not a value type. Job structs may not contain any reference types." so I'm confused on how I'm meant to pass things into it?

 

I think you should:

1.) try to understand the job system at all: https://docs.unity3d.com/Manual/JobSystem.html
2.) try out little & simple examples: https://github.com/stella3d/job-system-cookbook
3.) adapt you code to those examples

The job system is really easy to use once you got an idea of it.