NOTE: THIS IS NOT AN ISSUE WITH FRAMERATE. PLEASE READ BEFORE RESOLVING AS DUPLICATE.

In 1.8, for me, freshly created (and sometimes newly loaded) worlds make redstone very slow, with repeaters being slower, pistons lagging and not extending for a second, hoppers transferring items slower, and clocks are becoming slow as well. This is not a framerate issue, my FPS is fine. Redstone has become slower and is messing up my creations. Please fix this.