API is too slow for magicBridge.py?

[Andy Bryant]

I've been working on magicBridge and vanishingBridge, and they both have issues with speed.

For both I have to move very slow in order for them to work. Otherwise I fall many blocks before one appears beneath me, OR something I fall so fast one will never appear before me and instead they appear above me.

I don't think it's my computer. It's running minecraft 1.17 fine. I'm using 1.12 for this. 

Open to any suggestions, thanks!