Factorio Forums

https://youtu.be/E2_d141sQ2c

I first noticed a discrepancy with the biolab (pictures attached), then later noticed similar with the electromagnetic plant (video link, above).
In the video, you can see I swap out the electromagnetic plants and the speed obviously changes, going by the progress bars, but the displayed speed does not change.

I don't know if the issue exists with regular assembling machines or other entities, or under what circumstances this begins to occur.

Zip of the game is attached as well.
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I don't know if things changed in the ~6 hours since looking at the biolabs, but I have an earlier save (6 hours prior) as well for the biolabs.

Prior post has the more recent save attached.

Or am I just confused and the percentages are supposed to be static, given the base speed?
I haven't played much in a few years. Maybe I made a mistake.

Jon8RFC wrote: Mon Oct 27, 2025 12:01 pm Or am I just confused and the percentages are supposed to be static, given the base speed?

Yes, the percentages are relative to base speed. The total speed should be accurate and in your screenshots it changes. The bonus percentage from beacons/modules stays the same.

I am not seeing anything wrong. Quality of the machine affects base crafting speed so it does not show as a percentage bonus alongside of received speed module effects. Crafting speed is different and tooltip shows them as being different. Not a bug.