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dart / sdk / 2bbf99351e0274643b8ab0c14904efbb650ded8b
commit2bbf99351e0274643b8ab0c14904efbb650ded8b[log] [tgz]
authorJens Johansen <jensj@google.com>Thu Sep 07 07:11:42 2023 +0000
committerCommit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com>Thu Sep 07 07:11:42 2023 +0000
tree54e8e84eeaa39b6cc08780df8ee5870e694bc860
parent36d66768331bce63945616107a2b5aef3d8bc541 [diff]
[analyzer] Less duplicated line starts data with multiple contexts

When having multiple contexts we have duplicates of some things.
For instance line starts data.
This CL deduplicates some of it, and makes use of `Uint16List` and
`Uint32List` as appropriate (some where regular `List<int>`s before),
reducing the heap usage for analyzing `flutter/flutter` (80+ contexts)
when analyzing with an empty cache with about 165 MB.

Details:

```
_GrowableList (dart:core) (bytes):
Difference at 95.0% confidence
   -451040.00 +/- 0.00
   -0.79% +/- 0.00%

_Uint16List (dart:typed_data) (bytes):
Difference at 95.0% confidence
   6558032.00 +/- 0.00
   696.69% +/- 0.00%

_List (dart:core) (bytes):
Difference at 95.0% confidence
   -70840960.00 +/- 231371.19
   -9.58% +/- 0.03%

_Uint32List (dart:typed_data) (bytes):
Difference at 95.0% confidence
   -103560448.00 +/- 2829564.24
   -23.56% +/- 0.64%

heapUsage:
Difference at 95.0% confidence
   -173020528.00 +/- 7787712.50
   -4.78% +/- 0.21%
```
Change-Id: I49e23dde14a2faa7c8af94515b0ad1c669867c78
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/324501
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
3 files changed
tree: 54e8e84eeaa39b6cc08780df8ee5870e694bc860
  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.