Lagging on the page and typing text

Hi,

I notice that recently especially since last night after installing the push notification my site become lagging in term of typing and scrolling. In the desktop, i notice the respond for me to scroll taking time even the page already fully load.. and when I try to access in the phone browser, it also the same .. not even that, when I wanted to type, the character showing really slow. i.e. if I type "welcome" it should loading the character in real time but for my case, after finish typing 1 sentence the character satrt showing.