It seems that one of the surprises with Safari 10 on Mac OS Sierra is that it takes ages to perform a search using the search bar (using Google as default search engine).
It takes on average even more than 5 seconds to open the new search tab with google results.
I would rule out a system issue because I reinstalled the entire OS from scratch less than a week ago. This issue didn't change at all.
The only extensions that I am using are 1Password, LastPas and 1Blocker.
I tried using the search on private mode and it seems to get the same slow results so it should not be related to extensions.
Can I make it 1 second? On Chrome it works well.