| commit | 9cdd1d83f9a9fe9c21bc4e79233856cf6dbf2071 | [log] [tgz] |
|---|---|---|
| author | Derek Xu <derekx@google.com> | Fri Jul 12 14:01:54 2024 +0000 |
| committer | dart-internal-monorepo <dart-internal-monorepo@dart-ci-internal.iam.gserviceaccount.com> | Fri Jul 12 07:06:12 2024 -0700 |
| tree | 9ccbb535f21677a78cf23121ec04b37372f098af | |
| parent | b4aaeae7fc41d063dada99dc7d7a023d607c020d [diff] |
[JS Runtimes] Occasionally call performance.clearMarks and performance.clearMeasures Release Runtime Memory Footprint Measurements: I ran a program that made 500000 pairs of `Timeline.startSync(‘abc’)` + `Timeline.finishSync()` calls several times, each time with different contents in `sdk/lib/_internal/js_runtime/lib/developer_patch.dart`. First, I ran the program with the changes in this CL and observed that the maximum memory footprint shown in the Chrome Task Manager was 145 MB. Then, I reverted `sdk/lib/_internal/js_runtime/lib/developer_patch.dart` back to its state at HEAD and observed that the maximum memory footprint shown in the Chrome Task Manager was 655 MB. Finally, I replaced `_reportTaskEvent` in `sdk/lib/_internal/js_runtime/lib/developer_patch.dart` with an empty function and re-ran the program, and observed that the maximum memory footprint shown in the Chrome Task Manager was 30 MB. Debug Runtime Memory Footprint Measurements: I ran a program that made 500000 pairs of `Timeline.startSync(‘abc’)` + `Timeline.finishSync()` calls several times, each time with different contents in `sdk/lib/_internal/js_dev_runtime/lib/developer_patch.dart`. First, I ran the program with the changes in this CL and observed that the maximum memory footprint shown in the Chrome Task Manager was 366 MB. Then, I reverted `sdk/lib/_internal/js_dev_runtime/lib/developer_patch.dart` back to its state at HEAD and observed that the maximum memory footprint shown in the Chrome Task Manager was 1.06 GB. Finally, I replaced `_reportTaskEvent` in `sdk/lib/_internal/js_dev_runtime/lib/developer_patch.dart` with an empty function and re-ran the program, and observed that the maximum memory footprint shown in the Chrome Task Manager was 92 MB. Issue: https://github.com/flutter/flutter/issues/149141 Change-Id: I5423a6bd61cbce85d6d5b09282eb51a9318b7be3 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/375002 Reviewed-by: Ben Konyi <bkonyi@google.com> Commit-Queue: Derek Xu <derekx@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com> https://dart.googlesource.com/sdk/+/0ee3773c351d189c2ce0751bbd3f1f398c0ba8a7
Monorepo is:
With depot_tools installed and on your path, create a directory for your monorepo checkout and run these commands to create a gclient solution in that directory:
mkdir monorepo cd monorepo gclient config --unmanaged https://dart.googlesource.com/monorepo gclient sync -D
This gives you a checkout in the monorepo directory that contains:
monorepo/ DEPS - the DEPS used for this gclient checkout commits.json - the pinned commits for Dart, flutter/engine, and flutter/flutter tools/ - scripts used to create monorepo DEPS engine/src/ - the flutter/buildroot repo flutter/ - the flutter/engine repo out/ - the build directory, where Flutter engine builds are created third_party/ - Flutter dependencies checked out by DEPS dart/ - the Dart SDK checkout. third_party - Dart dependencies, also used by Flutter flutter/ - the flutter/flutter repo
Flutter's instructions for building the engine are at Compiling the engine
They can be followed closely, with a few changes:
goma_ctl ensure_start is sufficient.Example build commands that work on linux:
MONOREPO_PATH=$PWD if [[ ! $PATH =~ (^|:)$MONOREPO_PATH/flutter/bin(:|$) ]]; then PATH=$MONOREPO_PATH/flutter/bin:$PATH fi export GOMA_DIR=$(dirname $(command -v gclient))/.cipd_bin goma_ctl ensure_start pushd engine/src flutter/tools/gn --goma --no-prebuilt-dart-sdk --unoptimized --full-dart-sdk autoninja -C out/host_debug_unopt popd
The Flutter commands used to build and run apps will use the locally built Flutter engine and Dart SDK, instead of the one downloaded by the Flutter tool, if the --local-engine option is provided.
For example, to build and run the Flutter spinning square sample on the web platform,
MONOREPO_PATH=$PWD cd flutter/examples/layers flutter --local-engine=host_debug_unopt \ -d chrome run widgets/spinning_square.dart cd $MONOREPO_PATH
To build for desktop, specify the desktop platform device in flutter run as -d macos or -d linux or -d windows. You may also need to run the command
flutter create --platforms=windows,macos,linux
on existing apps, such as sample apps. New apps created with flutter create already include these support files. Details of desktop support are at Desktop Support for Flutter
Tests in the Flutter source tree can be run with the flutter test command, run in the directory of a package containing tests. For example:
MONOREPO_PATH=$PWD cd flutter/packages/flutter flutter test --local-engine=host_debug_unopt cd $MONOREPO_PATH
Please file an issue or email the dart-engprod team with any problems with or questions about using monorepo.
We will update this documentation to address them.
flutter commands may download the engine and Dart SDK files for the configured channel, even though they will be using the local engine and its SDK.gclient sync needs to be run in an administrator session, because some installed dependencies create symlinks.