Ever since the first snapshot of minecraft 1.12 the redstone has been acting up. I've never had a problem with lagg in this game but after updating to the snapshots, whenever I use comparator clocks with droppers the frames drop dramatically(e.x. from 60-10), and this could be a problem for people with not so powerful computers. I tested on the exact same world on the 1.11 and previous versions and there's pretty much no lagg whatsoever. Please let me know if this was useful because this is the first report I ever post. If you need any further information about this issue please let me know.