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dart / sdk / 36631759392c258a3e4e3fccfb49373649705b3b
commit36631759392c258a3e4e3fccfb49373649705b3b[log] [tgz]
authorJens Johansen <jensj@google.com>Wed Sep 18 14:15:39 2024 +0000
committerCommit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed Sep 18 14:15:39 2024 +0000
tree53209c07a501ac9ad113e7c606bea4fcf6608c90
parent53dcbbaee0a9f1ff42363a256458eb2a768fbabe [diff]
[scanner] StringScanner hints length

In a benchmark of the scanner (yet uncomitted) I get these changes when
using the StringScanner on kernels ast.dart 1000 times:

```
msec task-clock:u: -3.4705% +/- 0.3761% (-184.61 +/- 20.00)
page-faults:u: -0.1131% +/- 0.0007% (-271.44 +/- 1.65)
cycles:u: -3.9203% +/- 0.3881% (-847069842.84 +/- 83859667.38)
instructions:u: -6.2346% +/- 0.0000% (-2935747343.16 +/- 983.91)
branch-misses:u: -5.8606% +/- 0.9062% (-6402751.76 +/- 990004.92)
seconds time elapsed: -3.4701% +/- 0.3757% (-0.18 +/- 0.02)
seconds user: -4.1335% +/- 0.5301% (-0.21 +/- 0.03)
seconds sys: 6.6222% +/- 5.1230% (0.02 +/- 0.02)
Scavenge(   new space) goes from 145 to 127
```

Change-Id: Ic1e0540cc41636161c99571fb4215003dcc11949
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/385761
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
2 files changed
tree: 53209c07a501ac9ad113e7c606bea4fcf6608c90
  1. .dart_tool/
  2. .github/
  3. benchmarks/
  4. build/
  5. docs/
  6. pkg/
  7. runtime/
  8. samples/
  9. sdk/
  10. tests/
  11. third_party/
  12. tools/
  13. utils/
  14. .clang-format
  15. .gitattributes
  16. .gitconfig
  17. .gitignore
  18. .gn
  19. .mailmap
  20. .style.yapf
  21. AUTHORS
  22. BUILD.gn
  23. CHANGELOG.md
  24. codereview.settings
  25. CONTRIBUTING.md
  26. DEPS
  27. LICENSE
  28. OWNERS
  29. PATENT_GRANT
  30. PRESUBMIT.py
  31. README.dart-sdk
  32. README.md
  33. sdk.code-workspace
  34. sdk_args.gni
  35. sdk_packages.yaml
  36. SECURITY.md
  37. WATCHLISTS
README.md

Dart

An approachable, portable, and productive language for high-quality apps on any platform

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 platforms illustration

License & patents

Dart is free and open source.

See LICENSE and PATENT_GRANT.

Using Dart

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).

Building Dart

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.

Contributing to Dart

The easiest way to contribute to Dart is to file issues.

You can also contribute patches, as described in Contributing.

Roadmap

Future plans for Dart are included in the combined Dart and Flutter roadmap on the Flutter wiki.