Just wanted to say I did a few quick tests last night.
Using HE as the ultimate timing log, there’s a completely negligible speed difference between a HE automation and a YAML HA automation.
From a z-wave button, to a z-wave light switch, HE is reporting ~300ms regardless of how the automation is firing.
On HE I am using “Button Controller” and on HA I was just using the quick GUI Automation creator.
Pretty impressive that it’s equally as fast using MakerAPI as it is running entirely natively.