Details of my computer:
- Currently running Factorio 0.15.21
- AMD Radeon HD 7870 with up to date drivers
- AMD FX 8350
- Current graphics settings
This is looking at trees in the map view, note the GPU load spike and 2FPS:
Fewer trees on screen = more FPS, still way too low though, GPU still maxed out, note that this one isn't in map view:
It may be worth noting that I also get poor performance with smoke, but I turned that off long ago and it never bugged me again. I also have tried toggling "Enable tree sprite mipmaps" and restarting, but it made no difference.