Mhm. When I enable a task to post in the introduction forum, my site loads extremely slow. Removing the task makes it fast again. I have 400k members.
I have switched to Replied to a specific thread. This resolves the issue.
Yeah, I think this can be made a bit smarter. For one, I don't think it needs to check as often as it currently does. I'll look in to it for the next version.Yes you have to be careful with the advanced tasks. They run on every page view, which in your case is calling a large database call to see if a reply has been added.
The simple ones only run on the action.