I've been having this issue where zooming in and out in google maps using the safari browser is really laggy. If I use Chrome then the zooming in and out is buttery smooth. I have an iMac Retina 5k 27-inch Late 2014 computer running the latest macOS Sierra version 10.12.4. I tried to reset the NVRAM and I have 24GB of RAM with about 18GB free when this happens. I performed a complete wipe of the OS and reinstalled it, and only restored my user profile and no applications or settings. I still am having this issue. Does anyone have any tips or solutions?