Loading size files

When you open the Diff tab,
you’ll see instructions to load “old” and “new” size
files. Again, these files need to be generated from
the same application. Drag and drop these files into
their respective dialogs, and click Analyze Diff.

See Generating size files below for information
on generating these files.

Treemap and table

In the diff view, the treemap and tree table show
only data that differs between the two imported size files.

For questions about using the treemap, see Using the treemap above.

Generating size files

To use the app size tool, you’ll need to generate a
Flutter size analysis file. This file contains size
information for your entire application (native code,
Dart code, assets, fonts, etc.), and you can generate it using the
--analyze-size flag: