Tutorial using ECS to improve performance on a Tower Defense

As a part of a gamedev boot camp I made a tutorial applying Unity ECS to a tower defense game demo.

The code (Instructions: use the key "y" 2 times to switch to free camera and keep pressed LEFT SHIFT to be able to move around freely):

• The CPU stressed code example where I use MonoBehavior for the bullets and I get around 20 FPS: https://www.dropbox.com/s/y473ce8akr4nnu5/OneToSeven_Lesson22_DOTS_ECS_TowerBase.zip?dl=0
• The code using ComponentSystem for the bullets processing (I get a better performance, not great though): https://www.dropbox.com/s/6lbd9y1wobwd5r4/OneToSeven_Lesson22_DOTS_ECS_Completed.zip?dl=0
• Using SystemBase for the bullets processing (I get way better performance): https://www.dropbox.com/s/7m49qv53rli5ovd/OneToSeven_Lesson22_DOTS_ECS_Completed_Shootables.zip?dl=0

The video tutorial is:

• The slides: https://www.dropbox.com/s/z9xj321s943rrl0/22_ONE_TO_SEVEN_ECS.odp?dl=0
• The video tutorial:

I hope the tutorial helps someone who is interested in this topic.