kovarex wrote:Well, the rendering is not for free, and it is multithreaded, so it can take more cpu easily.

True that. But, maybe things can be optimized. Maybe render at a lower FPS when in menu/paused, if there's no input… or try to detect when the window is not visible and then skip the rendering.

The game simulation is paused when the game is paused so any CPU usage you're seeing is rendering and processing of input. I can't speak for the linux build but on Windows when I pause the game the CPU usage drops to almost nothing.

Well, my notebook (Haswell with on-chip GPU), is not very fast ...

mrvn wrote:By the way, what do you mean by "pause the game"? Just opening the game menu?

Shift+Space, for me the that's binding for "Pause game" in the Options/Controls/Game. But it's about the same in the menu, I think.

mrvn wrote:If you are playing under Linux I suggest starting factorio from a terminal and pressing ctrl-z to really pause the game and then "fg" to unpause it.

Well, I'm sending kill -STOP/-CONT, but the result should be the same. But it's a bit tedious.

Loewchen wrote:Update to 15.26 and post the log please.

There you go.

I am playing Factorio on a notebook. Sometimes I can only play some minutes at a time, so I usually leave it running, but paused. Since Factorio's CPU usage doesn't seem to reduce when paused, this keeps the fan spinning all the time, and the notebook gets quite warm. Would be nice if Factorio could ...