[analyzer] E2E benchmark also supports legacy protocol

Also add benchmark where lots of hover requests are fired,
mimicking IntelliJ behavior when holding ctrl and moving the mouse over
imports.

I'm getting these results on my machine:

```
4 files / CodeType.ImportCycle:
Initial analysis: 1.249438
Completion after change: 10.143719

4 files / CodeType.ImportChain:
Initial analysis: 1.367604
Completion after change: 9.936909

4 files / CodeType.ImportExportCycle:
Initial analysis: 1.233644
Completion after change: 10.011695

4 files / CodeType.ImportExportChain:
Initial analysis: 1.226382
Completion after change: 9.875991

4 files / CodeType.ImportCycleExportChain:
Initial analysis: 1.262932
Completion after change: 9.995607
```

notice the low number of files (in the chain*) or if it even is a chain
etc doesn't appear to change anything for the time it takes to become
responsive again.

Notice that in
https://github.com/dart-lang/sdk/issues/55281#issuecomment-2700500279 I
noticed that something similar happened for `edit.getFixes`, but I'm yet
to actually reproduce that.

Change-Id: Iff04124825c6ea2f759b4d048a0f2988709eaebf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/413981
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Phil Quitslund <pquitslund@google.com>
7 files changed
tree: 105db53251aca4ec7bd56fea5f0d1d548c6b0a58
  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.

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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.