I'm not op, but I used chrome on a fully upgraded 2011 13 inch MacBook air. New maps was so slow it was unusable. I used chrome.
Also not OP, but on my 2012 Macbook Air I had to turn off the maps preview because it was making my machine very warm, reached over 98C before I switched it off. Only took a minute. I was very disappointed.
Chrome on a 4 year old desktop. And chrome on a low end 1 year old desktop. Slow for both, not to the point of being unusable, but slow enough to be annoying.
Even on my new i5 laptop, it's not quite as snappy as the old version.