[cfe] Remember if finalizeExports was done

Before this CL, whenever a dill library builder was asked to compute
the outline it would finalize its exports - even if it was already done.
This is not really a problem (it mostly puts stuff into maps --- doing
it again will just overwrite what's already there with the same thing
again), but when having many dill library builders, and asking them to
compute the outline again and again because we've added a few new ones
(e.g. via kernel worker) it adds up to a lot of wasted time.

This CL adds a boolean to the dill library builders to avoid re-doing
this already done work.

An internal benchmark via kernel worker of lots of outline
calculations in worker mode with reuse and the incremental compiler
(and lots of dill loaded dependencies) goes from ~149 seconds to
~143 seconds.

Change-Id: I19cadbf64ff5e0ff117bad4df86c83832a1f28fa
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/105243
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Kevin Millikin <kmillikin@google.com>
1 file changed
tree: dc79970cfdb937ab2c4682f41bc5cf71333e0f98
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  2. .gitattributes
  3. .gitconfig
  4. .github/
  5. .gitignore
  6. .gn
  7. .mailmap
  8. .packages
  9. .vpython
  10. AUTHORS
  11. BUILD.gn
  12. CHANGELOG.md
  13. CONTRIBUTING.md
  14. DEPS
  15. LICENSE
  16. PATENTS
  17. PRESUBMIT.py
  18. README.dart-sdk
  19. README.md
  20. WATCHLISTS
  21. build/
  22. client/
  23. codereview.settings
  24. docs/
  25. pkg/
  26. runtime/
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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 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.

See LICENSE and PATENTS.

Using Dart

Visit the dart.dev to learn more about the language, tools, getting started, and more.

Browse pub.dev for more packages and libraries contributed by the community and the Dart team.

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.