| commit | 0ee3773c351d189c2ce0751bbd3f1f398c0ba8a7 | [log] [tgz] |
|---|---|---|
| author | Derek Xu <derekx@google.com> | Fri Jul 12 14:01:54 2024 +0000 |
| committer | Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> | Fri Jul 12 14:01:54 2024 +0000 |
| tree | 24138f687014a388532559e8ecc964a2056d9c13 | |
| parent | 612a1a452b33a8d4de1d70650985e82a2b875d5a [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>
Dart is:
Approachable: Develop with a strongly typed programming language that is consistent, concise, and offers modern language features like null safety and patterns.
Portable: Compile to ARM, x64, or RISC-V machine code for mobile, desktop, and backend. Compile to JavaScript or WebAssembly for the web.
Productive: Make changes iteratively: use hot reload to see the result instantly in your running app. Diagnose app issues using DevTools.
Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:
Dart Native: For programs targeting devices (mobile, desktop, server, and more), Dart Native includes both a Dart VM with JIT (just-in-time) compilation and an AOT (ahead-of-time) compiler for producing machine code.
Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).
Dart is free and open source.
See LICENSE and PATENT_GRANT.
Visit dart.dev to learn more about the language, tools, and to find codelabs.
Browse pub.dev for more packages and libraries contributed by the community and the Dart team.
Our API reference documentation is published at api.dart.dev, based on the stable release. (We also publish docs from our beta and dev channels, as well as from the primary development branch).
If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.
There are more documents in our repo at docs.
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.
Future plans for Dart are included in the combined Dart and Flutter roadmap on the Flutter wiki.