Hello,

I have a factory with ~145 Factorissimo factory MK1 buildings. Everything runs fine, however when I quickly move mouse across different factories, this causes UPS to drop significantly, which is annoying as the game stutters. Investigating via debug options reveals that the vast majority of time is spent in "Chart Refresh": ~10 ms while moving mouse around with ~25 ms peaks (while the rest of the update takes ~7 ms mods included). This occurs even when factory preview widget is disabled.

I'm playing with pollution disabled to increase UPS.

Could this have anything to do with the Factorissimo preview widget? Is there a way to get rid of this stutter?

EDIT: this seems to be issue with Factorio, as hovering over any entity (be it factory building or a pipe) causes this behavior.