The Vulkan specification allows a command buffer to be re-executed without re-recording it if there were no changes made to the resources used by the command buffer, including VkBuffer, VkImage, and other types of resources.

For submitting Vulkan rendering commands via VkQueueSubmit(), I know that most renderers just rebuild the cmdbufs every frame, since that makes it simpler to deal with dynamic scenes.
However, I wanted to challenge myself to build a renderer that only updates/invalidates the cmdbufs as needed, and reuses them otherwise.

I was reading the Vulkan Spec about extension VK_EXT_nested_command_buffer

According to the definition of dependency chain: