we've had similar spidertron related performance issues before https://www.reddit.com/r/factorio/comme ... _clearing/

just got a "invalid transport line index: 5" after trying to remove a splitter which was being fed directly from another splitter, while a fast inserter was taking iron ore out of the splitter being removed. Can't bother reproducing it right now since we're in a multiplayer game

FishSandwich wrote:0.11 was indended and designed for LAN gameplay, so save file sizes wouldn't have been taken into consideration. I'm sure the devs have plans to shrink the save files

if this is absolutely what the devs intended, fair enough. Gotta wait for 0.12 and see then. Have a nice day.

FishSandwich wrote:It's not a bug, and there are steps you can take to alleviate the problem.(which are inside the post you linked)

so you're saying this is an intended feature and we should rezip every save file without replay.dat?

Pretty much this. https://forums.factorio.com/forum/vie ... f=5&t=7862

replay.dat bloats save files to unimaginable levels, and it seems to be sent to players that connect to a multiplayer game.