hit F4 and in the Debug tab select show-time-usage and then hit F5 and see the time taken by the train pathfinder. if it's high, your rail segment count is too much. if it's in "Trains", that's likely just due to the sheer number - long trains perform better than slow trains. cargo wagons...

"built too much" - you just gave the breakdown of how it's being spent. belts, inserters, and assembling machines. I am more wondering if there is issues with the distance the trains need to travel or if the amount of rails and signals are taking a lot. I think I can reduce my trains by a...

I have a train based megabase with a large amount of trains and launching a lot of rockets and running a real LOW ups on my new pc. I have completed the first version and would like a breakdown on how my ups is being spent. This base will run in vanilla other then the use of creative power and void ...

https://forums.factorio.com/forum/vie ... =33&t=5013

i don't imagine this would be that hard, but it would give some real nice information.

The same way you can see your power production and resource production but for pollution. Showing what is creating the most pollution.