This tutorial covers changing the jobs from the first tutorial to be scheduled on worker threads.
Build tested on entities 0.4.0 preview.10 . Checked agains 2019.3.0f5 & Entities 0.5.0 Preview.17 on Jan 16, 2020. Packages used are shown here
The source is at https://github.com/ryuuguu/Unity-ECS-Life.git and is commit Tutorial Worker Threads f2 on Jan 2 30, 2020. The Zip file of the project is here.
Warning: DOTS is still bleeding edge tech. Code written now will not be compatible with first release …