Minecraft multiplayer is running slow all of a sudden?

So today I reset my laptop to get rid of all junk on it. But when I reinstalled my minecraft, the multiplayer was running really bad as in it was really unresponsive but no frame rate issues. The servers that I play on is not the issue because before the resetting of my laptop the multiplayer worked like a charm. And also the ping is not a problem either because even when I play on a server in my country the same thing happens. Please HALP.