## FlutterTimeline
Add a new class `FlutterTimeline` that's a drop-in replacement for `Timeline` from `dart:developer`. In addition to forwarding invocations of `startSync`, `finishSync`, `timeSync`, and `instantSync` to `dart:developer`, provides the following extra methods that make is easy to collect timings for code blocks on a frame-by-frame basis:
* `debugCollect()` - aggregates timings since the last reset, or since the app launched.
* `debugReset()` - forgets all data collected since the previous reset, or since the app launched. This allows clearing data from previous frames so timings can be attributed to the current frame.
* `now` - this was enhanced so that it works on the web by calling `window.performance.now` (in `Timeline` this is a noop in Dart web compilers).
* `collectionEnabled` - a field that controls whether `FlutterTimeline` stores timings in memory. By default this is disabled to avoid unexpected overhead (although the class is designed for minimal and predictable overhead). Specific benchmarks can enable collection to report to Skia Perf.
## Semantics benchmarks
Add `BenchMaterial3Semantics` that benchmarks the cost of semantics when constructing a screen full of Material 3 widgets from nothing. It is expected that semantics will have non-trivial cost in this case, but we should strive to keep it much lower than the rendering cost. This is the case already. This benchmark shows that the cost of semantics is <10%.
Add `BenchMaterial3ScrollSemantics` that benchmarks the cost of scrolling a previously constructed screen full of Material 3 widgets. The expectation should be that semantics will have trivial cost, since we're just shifting some widgets around. As of today, the numbers are not great, with semantics taking >50% of frame time, which is what prompted this PR in the first place. As we optimize this, we want to see this number improve.
- Bumps `vm_service` from `11.6.0` to `11.7.1`
- Bumps `web` from `0.1.3-beta` to `0.1.4-beta` and adds it everywhere.
- Moves `js` from `dependencies` to `dev_dependencies`
By default, the browser fuzzes the timer APIs such that they have a granularity of approximately 100 microseconds (this is due to Spectre mitigation techniques). However, many of the thing we are trying to measure actually have a much finer granularity than 100 microseconds. As a result, many of our benchmarks are extremely noisy and don't provide accurate data.
By serving the initial script files with the `Cross-Origin-Opener-Policy: same-origin` and `Cross-Origin-Embedder-Policy: require-corp` HTTP headers, the browser runs the benchmarks in a `crossOriginIsolated` context, which restores the fine granularity of APIs such as `performance.now()` to microsecond precision.
Also, we were considering anything an outlier that was more than one standard deviation away from the mean. In a normal distribution, that means we are only capturing 68% of the data and the rest are considered outliers. This is not ideal. Doing two standard deviations away captures 95% of the data, and the outliers are in the remaining 5%, which seems much more reasonable.
1. Add iOS and macOS migration to mark "last upgraded" Xcode version to 14.3 to prevent `Update to recommended settings` warning.
2. Update iOS and macOS templates to same.
3. Update iOS template to set `BuildIndependentTargetsInParallel` to YES as suggested. I didn't add a migration for this since it seems like a minor optimization and I don't think it's worth a potentially botched/corrupted migration.
4. Run all example/integration test project to see migrator work.
5. Add some missing test projects to the build shard since I noticed they were missing and I had to build those manually outside `SHARD=build_tests`.
Fixes https://github.com/flutter/flutter/issues/125817
See https://github.com/flutter/flutter/pull/90304 for Xcode 13 example.
* Revert "Remove references to BindingBase.window (#122119)"
This reverts commit c7681f00cf.
* Revert "Remove another reference to BindingBase.window (#122341)"
This reverts commit 6ec4445063.
* Revert "Reland (2): Removes single window assumptions from `flutter_test` (#122233)"
This reverts commit eb3d317ea0.
* Revert "Remove single view assumption from TestViewConfiguration (#122352)"
This reverts commit 927289fb4e.
* Revert "Updates `flutter/test/cupertino` to no longer use `TestWindow` (#122325)"
This reverts commit 67e17e45f0.
* Revert "Updates `flutter/test/gestures` to no longer reference `TestWindow` (#122327)"
This reverts commit c2a5111cc0.
* Revert "Updates `flutter/test/rendering` to no longer use `TestWindow` (#122347)"
This reverts commit 28b65e089b.
* Revert "Updates `flutter_localizations/test` to stop using `TestWindow` (#122321)"
This reverts commit 01367d52d7.
* add asset manifest bin loading and asset manifest api
* use new api for image resolution
* remove upfront smc data casting
* fix typecasting issue
* remove unused import
* fix tests
* lints
* lints
* fix import
* revert image resolution changes
* Update image_resolution_test.dart
* Update decode_and_parse_asset_manifest.dart
* make targetDevicePixelRatio optional
* Update packages/flutter/lib/src/services/asset_manifest.dart
Co-authored-by: Jonah Williams <jonahwilliams@google.com>
* Update packages/flutter/lib/src/services/asset_manifest.dart
Co-authored-by: Jonah Williams <jonahwilliams@google.com>
* fix immutable not being imported
* return List in AssetManifest methods, fix annotation import
* simplify onError callback
* make AssetManifest methods abstract instead of throwing UnimplementedError
* simplify AssetVariant.key docstring
* tweak _AssetManifestBin docstring
* make AssetManifest and AssetVariant doc strings more specific
* use List.of instead of List.from for type-safety
* adjust import
* change _AssetManifestBin comment from doc comment to normal comment
* revert to callback function for onError in loadStructuredBinaryData
* add more to the docstring of AssetManifest.listAssets and AssetVariant.key
* add tests for CachingAssetBundle caching behavior
* add simple test to ensure loadStructuredBinaryData correctly calls load
* Update asset_manifest.dart
* update docstring for AssetManifest.getAssetVariants
* rename getAssetVariants, have it include main asset
* rename isMainAsset field of AssetMetadata to main
* (slightly) shorten name of describeAssetAndVariants
* rename describeAssetVariants back to getAssetVariants
* add tests for TestAssetBundle
* nits
* fix typo in docstring
* remove no longer necessary non-null asserts
* update gallery and google_fonts versions
---------
Co-authored-by: Jonah Williams <jonahwilliams@google.com>
* add asset manifest bin loading and asset manifest api
* use new api for image resolution
* remove upfront smc data casting
* fix typecasting issue
* remove unused import
* fix tests
* lints
* lints
* fix import
* revert image resolution changes
* Update image_resolution_test.dart
* Update decode_and_parse_asset_manifest.dart
* make targetDevicePixelRatio optional
* Update packages/flutter/lib/src/services/asset_manifest.dart
Co-authored-by: Jonah Williams <jonahwilliams@google.com>
* Update packages/flutter/lib/src/services/asset_manifest.dart
Co-authored-by: Jonah Williams <jonahwilliams@google.com>
* fix immutable not being imported
* return List in AssetManifest methods, fix annotation import
* simplify onError callback
* make AssetManifest methods abstract instead of throwing UnimplementedError
* simplify AssetVariant.key docstring
* tweak _AssetManifestBin docstring
* make AssetManifest and AssetVariant doc strings more specific
* use List.of instead of List.from for type-safety
* adjust import
* change _AssetManifestBin comment from doc comment to normal comment
* revert to callback function for onError in loadStructuredBinaryData
* add more to the docstring of AssetManifest.listAssets and AssetVariant.key
* add tests for CachingAssetBundle caching behavior
* add simple test to ensure loadStructuredBinaryData correctly calls load
* Update asset_manifest.dart
* update docstring for AssetManifest.getAssetVariants
* rename getAssetVariants, have it include main asset
* rename isMainAsset field of AssetMetadata to main
* (slightly) shorten name of describeAssetAndVariants
* rename describeAssetVariants back to getAssetVariants
* add tests for TestAssetBundle
* nits
* fix typo in docstring
* remove no longer necessary non-null asserts
Co-authored-by: Jonah Williams <jonahwilliams@google.com>
This updates the framework to provide higher level wrappers around ui.instantiateImageCodecWithSize(). Functionally, this doesn't change anything (other than deprecating the older loadBuffer() method in favor of loadImage()), but it sets the stage for a simpler change that will allow us to provide a more flexible way to load sized images.
#118543
* Add focus detector to CupertinoSwitch
* Add comment
* Remove whitespace
* Add focusColor constructor to CupertinoSwitch
* Remove whitespace
* Add color type
* Remove gap in border
* Adjust color and line thickness
Update test expectations from application/javascript -> text/javascript
`package:mime` now uses `text/javascript` and not `application/javascript`.
See https://github.com/dart-lang/mime/pull/76.
See https://datatracker.ietf.org/doc/html/rfc9239.
> This document defines equivalent processing requirements for the various script media types. The most widely supported media type in use is `text/javascript`; all others are considered historical and obsolete aliases of `text/javascript`.
* Add Info.plist from build directory as input path to Thin Binary build phase
* fix directive ordering
* migrate benchmark, integration, and example tests
* Roll Flutter Engine from 67254d6e4b03 to 8d83b98c55b3
* Roll Dart SDK from 35a9facce191 to e517487c5679 (Dart 3.0) (#38105)
* Bump SDK versions.
* Bump Dart SDK version constraints
* Update shrine package to 2.0.1 (null safe version)
* Fix more tests.
* Include patches from Jason for min android sdk version
* Fix analyzer warning
