Echo Lake Tech has a neat tip on how to speed up user response times for an app created on Bubble.io. The idea involves replacing pages that a user moves between frequently with "group" elements.
Every time you switch to a different page in your app you're accessing Bubble's infrastructure which slows things down slightly. If the user has to switch between certain pages often enough that slight delay can add up, slowing down the user's response time. Creating two or more "virtual pages" on a single page will avoid that interaction and help avoid any slowdown.
Go to https://echolaketech.com/2020/11/02/one-strategy-to-improve-your-bubble-io-no-code-web-apps-performance/ for a full explanation and video of how to implement "group pages". You most likely don't need to do this for all your pages, but it could be worth a look in order to make your app as efficient as possible.