Slowness in Honeycode could be due to different reasons, so just to check, are you seeing slowness only when editing particular automations?
If that be the case, one suggestion we have is to split larger automations into separate smaller automations. This is also a method that can help you see if a particular step needs to be looked at.
Also, if you continue to see performance issues with automations or other areas of the product, please submit an issue report to us in Honeycode. This provides us with diagnostic and log info that is helpful for our team. (You can do so by clicking on the Help icon > Report an issue)