I experience this pain also—I use comparatively cheap phones, currently a Samsung Galaxy J1 2016, and so the FastMail app is seldom running when I open it. Opening an email from a notification takes me 9–13 seconds in Australia, depending on various conditions. Partly in consequence but partly also due to my personality, I only use the app on my phone for the notifications (for which no startup is needed) or when I need access to my emails and am away from my laptop.
When we start using service workers, we’ll be able to load without any network round-trips, a quick measurement of which suggests about four seconds saved for me in Australia (high latency, remember—for people in the US, the saving will be closer to a second and a half), so the nine seconds is hopefully then down to about five, five that we can subsequently work on optimising more aggressively, once the biggest obstruction (the network) is removed.
But all of this will take time to make happen. In the mean time, thanks for recommending FastMail to people with the caveat: I agree wholeheartedly with you on it!
When we start using service workers, we’ll be able to load without any network round-trips, a quick measurement of which suggests about four seconds saved for me in Australia (high latency, remember—for people in the US, the saving will be closer to a second and a half), so the nine seconds is hopefully then down to about five, five that we can subsequently work on optimising more aggressively, once the biggest obstruction (the network) is removed.
But all of this will take time to make happen. In the mean time, thanks for recommending FastMail to people with the caveat: I agree wholeheartedly with you on it!