Add information about existing imports to completion response.

This adds quite a lot of information though, because we send many

Before: 20686 characters.
After:  55345 characters.

Theoretically we could do better, and send information about existing
imports only once as well, so when the user continues typing in a
single file, without touching imports, we don't send any new data
about imports (maybe just a confirmation that it is still the same).
But I'm not sure if this is a worthwhile optimization.

Actually, even included suggestion sets have similar property - they
don't change for a given file, unless there are changes to other
libraries which we might want to include.

Change-Id: I2f55e2dc85508849146aa39eb279beabaec937c0
Commit-Queue: Konstantin Shcheglov <>
Reviewed-by: Brian Wilkerson <>
15 files changed
tree: fa6dd85706077e496aeb6a79c225c9fa393be71b
  1. .clang-format
  2. .gitattributes
  3. .gitconfig
  4. .github/
  5. .gitignore
  6. .gn
  7. .mailmap
  8. .packages
  9. .vpython
  14. DEPS
  18. README.dart-sdk
  21. build/
  22. client/
  23. codereview.settings
  24. docs/
  25. pkg/
  26. runtime/
  27. samples-dev/
  28. samples/
  29. sdk/
  30. tests/
  31. third_party/
  32. tools/
  33. utils/


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 has 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.


Using Dart

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Building Dart

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There are more documents on our wiki.

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