Server redstone lag in 1.8 and above

To start this is not an fps isseu this is server lag i run the most recent version of minecraft (minecraft 1.8.2) and with the most recent vannilla server downloaded from the minecraft website. The bug here is that redstone lags on worlds played in 1.7
When i create a repeater (doesn't matter what kind of repeater) the redstone goes like tick ---- tick ----- tick and then the server closes itself