Do agents perform their actions simultaneously? If yes, what's the point of shuffle_do()?

[PigeonZow]

Hi, I'm new to Mesa and had a question about how agents' actions are scheduled; Do agents perform their actions simultaneously, only using information available from the previous step? If yes, what is the point of shuffle_do() instead of do()? If not, is there a way to make actions happen "at the same time" (agents act based off of only the previous step's information)?

A naive google search led me to find the deprecated SimultaneousActivation from an older version of Mesa being replaced by do, but I'm still not completely sure.

My motivation for asking this is that some of the agents in my simulation make API calls and I'm trying to parallelize them.

Thanks!