We build in Flutter and have more than twenty apps in the repository to measure, so these pages are written from build output, dependency lists and our own store listings rather than from benchmarks somebody else ran. Each one says how it was measured, and says what it could not measure.
What is and is not here
Every app we ship is Flutter, so that is what we can write about first-hand. Where a page compares anything else it will say plainly that the numbers are somebody else's, because the only reason to read this section rather than the documentation is that the figures came off our own apps.
None of these pages concludes that a framework or a package is simply the right one. They describe what a choice cost us, on our apps, on a stated date. If you are here for the consumer side instead, the apps are on our apps page and the writing about other companies' apps is in the reviews.