Factorio Forums

If you enter editor mode and change the speed to x2, spoilable items do spoil twice as fast, but anything above that, the spoilage remains the same as x2 speed.
The same goes for captive biter spawners consuming bioflux. It consumes it and generated biter eggs at x2 speed, but not any faster than that even if the speed settings is increased all the way to x64

Thanks for the report however this is because it’s not running at that speed. It runs as fast as it can ok your computer and in this case it hit the limit of what your computer can do.