It seems to me that Google assumes Chrome is the only app you have open. It is optimized for performance for the sites you have open, and it doesn't care about

It seems to me that Google assumes Chrome is the only app you have open. It is optimized for performance for the sites you have open, and it doesn't care about the performance of other apps you are using. This is in line with Google's revenue model. Safari on the other hand wants to make sure your whole computer is responsive, and has good battery life. If native apps work better than web apps that is fine. This is in line with Apple's revenue model.