I wrote a mod which stores quite a lot of data for each entity it in the game. When the factory becomes big (say 10k entities) it becomes slow to save and load the game. Around 20 seconds for 10k entities. The save file is not too big, 2 MB compressed, the "script.dat" inside the save file...

Thank you prg, that indeed works. I tried almost the same code and didn't work for me.

Thanks for the tip. Unfortunately lab.get_inventory(defines.inventory.lab_input)[1 ... 7].durability doesn't seem to change.

I'm working on a mod to calculate the utilization of various buildings. I mean to calculate how many percentage of the last minute the building was "working". I found no universal flag for this, even though the game animates the buildings while they are working (i.e. the factory shows some...