This is only when forge is installed. I hit the W for a second and I move around 5 feet, that kinda lag when I walk I lag consistently. My frame rates don't drop of what I can tell by looking at them while I play but I do lag the same way. I get input lag. Without forge installed I always have basic ones which are as follow: (with modloader) Rei's minimap, auto switch, timber, too many items, and optifine. I use as the same as follow: (with forge universal) dynamic lights, rei's minimap, auto switch, timber, too many items and optifine.
I hope that was more specific. Sorry for last time that was quite "unexplained".