Hi, I noticed waved lags lately so i had to look where it comes from. It surprised me a bit but it was Pollution Solutions that ate UPS everytime a laser was attacking asterioids in space.

So i looked a bit in the source and found that all deaths are cause a calculation.
I changed the code local slightly now to fix this:

--script.on_event(defines.events.on_entity_died, function(event) OnEntityPreRemoved(event) end)
--script.on_event(defines.events.on_entity_died, function(event) EntityDied(event) end)
script.on_event(defines.events.on_entity_died, function(event)
local entity = event.entity
if not entity or not entity.valid then return end

-- ignore player-owned stuff
if entity.force == game.forces.player then return end

-- ignore asteroids
if string.find(entity.name, "asteroid", 1, true) then return end

OnEntityPreRemoved(event)
EntityDied(event)

end)

This also considers that there multiple factions for biters/player teams. So i only excluded player force and asteroids. This alone fixed it for me. UPS before peaked easy on 27 now its 0.038.
Please review the code since i am not often use lua.
Thank you a lot for port this mod.