Is there an elegant way to control the level of concurrency using the

map()

functionality? My scenario is a list of URLs that should be used for making requests to but want to perform the requests in batches of 'n' rather than overwhelming a server with them all at once.

Yes, there is - you can leverage tags on your task decorator to set the tag, and then in the UI you can leverage task run concurrency to limit the number of concurrent task runs for that tag.

from prefect import task

@task(tags=["yourtagname"])
def my_task():
    pass

Perfect, thanks @Anna Geller