I have an idea of what part of the issue is, it falls in line with some other observed performance issues, but there's no shot term fix. Dungeons are smaller, densely packed areas, so when AreaStateCache goes to save the location of chests and items, the pathfinds to them all start to add up and hurt performance. To put simply, OldGrindBot/OldRoutine simply do too much in a way that adds performance overhead. However, removing a bunch of features and options isn't the solution, but rather finding a better way to do existing things.
The other part of the problem that I've been looking into for a while now is something related to pathfinding and the way the meshes are generated. Since PoE generates their maps randomly at runtime, we can't make static meshes that are optimized to ensure there are no issues with the generation. As a result, since the terrain is so dynamic, there might be some bugs in the pathfinding library we are using when applied to some of the terrain meshes being generated. I already know that to be the case for one of the maps that uses the Fellshrine tileset; there's a pathfinding lockup bug triggered from the way that terrain is generated. That's why the X button is on the main gui next to STart now, to kill the bot thread in case it happens.
For now, we're stuck with a lot of these random performance issues, but we're always looking to find ways to improve what's already there.
