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dart / sdk.git / e05a423e049c8ea0193db1edd681d2f9f39771c9
commite05a423e049c8ea0193db1edd681d2f9f39771c9[log] [tgz]
authorNate Biggs <natebiggs@google.com>Wed Feb 05 19:01:45 2025 -0800
committerCommit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed Feb 05 19:01:45 2025 -0800
tree515cbe11069726ed76fcef9cd4d79cb11d9d6952
parent07b7cfed076131afbb10b695bdcad75023305ace [diff]
[dart2wasm] Avoid extra global definitions for int constants that are wasmI32.

In a few places we create IntConstants to represent constant fields that are typed as WasmI32. If these are nested within other constants we end up hitting ConstantCreator.visitIntConstant for them. This always generates a global for a BoxedInt constant, whether it's used or not.

The global we create goes unused because in constant intiailizer for the outer constant we use the wasmI32 value directly.

At -O0 this reduced the wasm binary size by ~24k for a simple Flutter app. Binaryen mostly treeshakes these unused globals but I still see a slight improvement even with binaryen running.

Change-Id: I89b8392138269d7322196fa415e56e3062a46088
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/408121
Commit-Queue: Nate Biggs <natebiggs@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
3 files changed
tree: 515cbe11069726ed76fcef9cd4d79cb11d9d6952
  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.