It might not be generally recommended to start messing around in the developer settings on your device, but there is a little setting in there that can be used to slightly, but perceptibly, speed up general use of your device. The little known 'animation speeds' settings sit with the equally useful DPI settings.
First up, you need to enable 'Developer Mode' on your device. This is easy - in the settings app, go to the about screen and find the 'build number'. Got it? Tap this 5 times in quick succession and you'll see 'You are now a developer!' on screen (if you are on Oreo you may also need to enter your PIN). Now that's done, when you go back a level you'll see a new menu for 'Developer Options'.
In this menu, in the drawing section, you'll find 'Window animation scale', 'Transition animation scale' and 'Animator duration scale'. The first thing I always do on a device? Drop these down to 0.5x from the default 1x. The next thing I always do? Set DPI to 411 on the option below - this one is useful if you want more granularity than the standard Display menu gives you.
Give it a go and see how you find it, you can easily change it back!
Edited by PaulOBrien