| ## Treemaps | |
| For each commit to [flutter/engine](https://github.com/flutter/engine) the Chromebots generate treemaps illustrating the sizes of the individual components within release builds of `libflutter.so`. The treemap is uploaded to Google Cloud Storage and linked from the [LUCI](https://ci.chromium.org/p/flutter/g/engine/console) console: Select a "Linux aot" build and search for "Open Treemap". | |
| Alternatively, a link to a treemap can be constructed as follows: | |
| `https://storage.googleapis.com/flutter_infra_release/flutter/<REVISION>/<VARIANT>/sizes/index.html` where: | |
| * `<REVISION>` is the git hash from [flutter/engine](https://github.com/flutter/engine) for which you want the treemap, and | |
| * `<VARIANT>` can be any android release build, e.g. `android-arm-release` or `android-arm64-release`. | |
| ## Benchmarks | |
| In [devicelab](https://github.com/flutter/flutter/tree/main/dev/devicelab) we run various benchmarks to track the APK/IPA sizes and various (engine) artifacts contained within. These benchmarks run for every commit to [flutter/flutter](https://github.com/flutter/flutter) and are visible on our [build dashboard](https://flutter-dashboard.appspot.com/). The most relevant benchmarks for engine size are: | |
| * APK/IPA size of Flutter Gallery | |
| * Android: `flutter_gallery_android__compile/release_size_bytes` | |
| * iOS: `flutter_gallery_ios__compile/release_size_bytes` | |
| * APK/IPA size of minimal hello_world app | |
| * Android: `hello_world_android__compile/release_size_bytes` | |
| * iOS: `hello_world_ios__compile/release_size_bytes` | |
| * Size of bundled `icudtl.dat` | |
| * Compressed in APK: `hello_world_android__compile/icudtl_compressed_bytes` | |
| * Uncompressed: `hello_world_android__compile/icudtl_uncompressed_bytes` | |
| * Size of bundled `libflutter.so` (release mode) | |
| * Compressed in APK: `hello_world_android__compile/libflutter_compressed_bytes` | |
| * Uncompressed: `hello_world_android__compile/libflutter_uncompressed_bytes` | |
| * Size of VM & isolate snapshots (data and instructions) | |
| * Compressed in APK: `hello_world_android__compile/snapshot_compressed_bytes` | |
| * Uncompressed: `hello_world_android__compile/snapshot_uncompressed_bytes` | |
| ## Comparing AOT Snapshot Sizes | |
| A detailed comparison of AOT snapshot sizes can be performed using the [instructions documented here](./benchmarks/Comparing-AOT-Snapshot-Sizes.md). |