If you mean OSX do this:<p>- Open Mail, roughly time how long it takes from left pane click to message fully rendered on the right (~2-3 seconds)<p>- Open Dropbox (fast before it goes away!) and do the same (~250ms)<p>I get roughly 100-150 emails overnight that I go through in the morning. At 2-3 seconds PER THREAD render this is insanely unproductive use of my time.<p>Every time I open OSX Mail I have this exact process in my head and I promptly close it.