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dart / sdk / 4f03bd0c30bb9b26dd464edd5c7f1edc549125c1
commit4f03bd0c30bb9b26dd464edd5c7f1edc549125c1[log] [tgz]
authorNate Biggs <natebiggs@google.com>Wed Jul 26 02:23:40 2023 +0000
committerCommit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed Jul 26 02:23:40 2023 +0000
tree09464d6702da2656639f6d6d19f3ca505a792790
parentba005169c5147693134d0d46598038d252231873 [diff]
[dart2js] Defer loading of codegen results.

This was landed a while ago as https://dart-review.googlesource.com/c/sdk/+/254600. However, this had to be rolled back because at the time this increased memory usage for the emitter phase. This change prevented GC from cleaning up the byte arrays of the codegen serialized files which resulted in an increased max heap.

However, now that we map (rather than copy) files into memory, there is no overhead to keeping a reference to the codegen serialization files.

Thanks to recent improvements in the efficiency of deferred serialization this change seems to improve max memory usage by up to 1.2GB for the emitter phase. Avoiding caching results also helps in this regard, usage of the results is fairly localized.

Change-Id: I4d401a877cb74cbb36b511eb598a759fe300fd5d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/316180
Commit-Queue: Nate Biggs <natebiggs@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
2 files changed
tree: 09464d6702da2656639f6d6d19f3ca505a792790
  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. .vpython
  22. AUTHORS
  23. BUILD.gn
  24. CHANGELOG.md
  25. codereview.settings
  26. CONTRIBUTING.md
  27. DEPS
  28. LICENSE
  29. OWNERS
  30. PATENT_GRANT
  31. PRESUBMIT.py
  32. README.dart-sdk
  33. README.md
  34. sdk.code-workspace
  35. sdk_args.gni
  36. SECURITY.md
  37. WATCHLISTS
README.md

Dart

A client-optimized language for fast apps on any platform

Dart is:

  • Optimized for UI: Develop with a programming language specialized around the needs of user interface creation.

  • Productive: Make changes iteratively: use hot reload to see the result instantly in your running app.

  • Fast on all platforms: Compile to ARM & x64 machine code for mobile, desktop, and backend. Or compile to JavaScript for the web.

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 on our wiki.

Contributing to Dart

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

You can also contribute patches, as described in Contributing.