Yup. Basically I have to access www.google.com first then only searching through address bar would be instant.

Yes I do have Turbo enabled.
I only have lastpass as my plugin.

Yeah. What I mean is the time it takes for the search result page to load.

When searching through the search bar (google), it will show the results after 10+ seconds or fail to show at all.
After successfully searching through the search bar, the next searches will be instant.
But after browsing for some time, it will just slow down again when I use the search bar.
Using www.google.com website to search is almost instantaneous, using to go to websites is also fast.