Thanks for that link, I really hope the fix in 33 gets my friends back at 60fps

To be able to clean-up our mess in game. I've created a small mod (artificial-tree-soil) that will allow us to better combat pollution after we kill all the biters in a not so-game-breaking/cheaty way.

By the way, it looks like "entity update" is taking the most time. There is a separate debug view that shows which entity type takes how much time. I'd be curious to see which entity it is. In our save this is dominated by "Unit" which is mostly biters. I'm curious to see what happens in your save ...

That's so weird, the game then spends 1.5ms (about 10% of its frame budget) on I think <20 demolishers?

I'm currently playing a Space Age game with a couple of friends. We have put quite some hours in our base, but we're nowhere near the kind of megabases that I see shared here and on Youtube and Reddit. Still my friend's PCs are having trouble running at close to 60 ups. Even my 9900K can barely make ...

Ouch looks like our gut-feeling that it happened in 2.0.21 was off. But wow that's a great improvement! Great that you were able to figure this out so fast. Looking forward to the update and ever increasing performance of Factorio!

Of course, and it could be gut feeling that this only started in 2.0.21. I've attached a save that I think is the most recent pre 2.0.21 save that we have. We were working on our oil but I think the biggest pipelines are already here in this save.

Problem
On a reasonable large map on Nauvis the FPS drops significantly when turning on the 'show pipelines' option in map mode when completely zoomed out. We have 23k pipes and 11k underground pipes.

Steps to reproduce
1. Open the attached save game
2. Open the map-view on Nauvis
3. Zoom out ...