App slowing down?

Hi,
I’ve been trying to figure out why my method call was so slow to update data, I was looking into this.unblock / Meteor.defer but it didn’t really help… It was weird because it was fine before but all of a sudden it was painfully slow. I remembered before where I had a different problem where each save was taking like ~30 seconds for meteor to reload but it was fixed by restarting computer which reduced it to ~10 seconds (then by the end of the day it creeps back up to ~30 seconds).

How I fixed it was by closing localhost:3000 tab from chrome and reopened it (without restarting server or anything else) and now it works like before. Fast and snappy. Why is this?

Note that I haven’t restarted chrome in a week or so, and I’m using MacBook 12’ which is pretty slow system.