Updated from 1.8 to 1.9-2.2 result in slower initial load on browser

Anyone encounter slowness on initial load when upgrading meteor to higher than 1.8.3 version ? I tried from 1.9 all way to 2.2 and the initial load on the browser is taking almost 10x slower from around 4s to 30s. I am quite new to meteor so any help and direction would be appreciated

Better check the changes from the changelog from your version to 1.9 (and versions in between) for any clue on why it became slow