Automatically adjusts the construction robot queue update rate the game controls internally to check every ghost on the map at least once in a set time frame (Factorio defaults to 10 seconds where as this mod defaults to 4 seconds).
The mods impact to game performance is negligible however if you have too many ghosts and robots active at the same time you will undoubtedly create performance issues for yourself because the game scans faster at more frequent settings.
This mod is the difference between being able to use 10k or 100k construction robots at the same time.