TBH, that's a side effect of "EVERYthing is a webpage, because that's the way it is!" Of course a map application is SLOOOOOOW when forced to go through all the intermediate steps to resemble a web page. Mapping apps that forgo this convention are snappy; but no: a chat client is a web browser, a map client is a web browser, the "show me two lines of text" notification bar is a God-damned webbrowser.