Unity Jobs/DOTS Vs Compute Shader

multi-threading enables parallel (data) processing. Multi-threading means: multiple processors working together simultaneously.

• "Unity Jobs" is a system that makes CPU multi-threading easy.

• "Compute shader" allows you to use a GPU for general computation; as an co-processor, essentially.

For example: processor #1 runs gameplay code, processor #2 calculates physics, processor #3 works on graphics, processor #4 handles music & sound effects etc.

Or: Let's say you have VERY big array to do something with. You process that data on a single CPU and it's turn out to be very slow, resulting in low framerate. So, to increase performance, you divide that array into 4 equal chunks, one for every processor to process simultaneously. This will speed up the process about 4x. You just multi-threaded it.

If that's not enough you can sometimes use a compute shader and gain >100x speedup $$anonymous$$us time to move that data between the CPU-GPU back & forth (not always worth it).