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Stephen Adams 6ca7571e2b [benchmark] Benchmark for switch on various constant types 
AOT:
SwitchFSM.enum(RunTime): 29.549523327947906 us.
SwitchFSM.int(RunTime): 37.73789702628717 us.
SwitchFSM.class(RunTime): 138.6418530572675 us.
SwitchFSM.string(RunTime): 797.54075 us.

dart2js+V8:
SwitchFSM.enum(RunTime): 31.484299349840917 us.
SwitchFSM.int(RunTime): 26.022895908416366 us.
SwitchFSM.class(RunTime): 91.67433302667894 us.
SwitchFSM.string(RunTime): 92.31338451577098 us.

Both AOT and dart2js are 'good at' switches on enum values.

When compiled with --enable-experiment=records,patterns:

AOT:
SwitchFSM.enum(RunTime): 141.75470079359405 us.
SwitchFSM.int(RunTime): 145.25322604030737 us.
SwitchFSM.class(RunTime): 138.45460840662005 us.
SwitchFSM.string(RunTime): 797.226 us.

dart2js+V8:
SwitchFSM.enum(RunTime): 98.93787283573403 us.
SwitchFSM.int(RunTime): 29.459852700736498 us.
SwitchFSM.class(RunTime): 98.62184338405162 us.
SwitchFSM.string(RunTime): 92.035889371936 us.

There is work to be done to recover the performance.

Change-Id: I1197129cb32615a06a63a05d7ba300b46c68b4d2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/287246
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Stephen Adams <sra@google.com>
2023-03-10 04:21:13 +00:00
.dart_tool [infra] re-land work to auto-generate .dart_tool/package_config.json 2022-04-12 17:21:02 +00:00
.github Bump github/codeql-action from 2.2.4 to 2.2.5 2023-02-28 12:08:29 +00:00
benchmarks [benchmark] Benchmark for switch on various constant types 2023-03-10 04:21:13 +00:00
build fix //build/config/linux/pkg_config.gni 2023-03-09 11:44:44 +00:00
docs Spelling pkg analyzer lib 2023-01-25 14:08:27 +00:00
pkg Report RELATIONAL_PATTERN_ARGUMENT_TYPE_NOT_ASSIGNABLE instead. 2023-03-10 01:56:23 +00:00
runtime [vm/compiler] Keep and propagate static types during local type propagation 2023-03-09 21:18:49 +00:00
samples Revert "Add more interface and final modifiers to dart:core." 2023-03-09 13:09:57 +00:00
sdk [ddc] Default native null asserts on in sound mode 2023-03-09 23:43:49 +00:00
tests Add tests for non-primitive equality in switch cases. 2023-03-10 02:39:28 +00:00
third_party Revert "[vm] Remove tcmalloc and malloc profiler." 2023-03-06 10:28:33 +00:00
tools Replace identifierNotFUNCTION with identifier. 2023-03-09 14:50:46 +00:00
utils [build] Use relative paths. 2023-03-08 22:10:42 +00:00
.clang-format
.gitattributes
.gitconfig
.gitignore [test_runner] Create --write-logs dir, add default dir to .gitignore 2022-11-15 09:59:08 +00:00
.gn
.mailmap Fixed various typos in a lot of files 2022-07-25 12:21:59 +00:00
.style.yapf
.vpython
AUTHORS Simplify the license situation 2022-09-14 21:06:22 +00:00
BUILD.gn Roll Fuchsia SDK to 7b3b23b2c0da59b3aceab6c49fbe7d9ed34d7382. 2023-02-09 22:43:36 +00:00
CHANGELOG.md Add boolean parse 2023-03-09 15:14:32 +00:00
codereview.settings
CONTRIBUTING.md Add more details to contributing docs 2022-03-16 07:56:58 +00:00
DEPS [co19] Roll co19 to 6472c72a65dac708a4f420666837a37c7ff4f54d 2023-03-09 21:12:43 +00:00
LICENSE
OWNERS [owners] update the top-level owners file 2022-11-11 21:03:52 +00:00
PATENT_GRANT
PRESUBMIT.py Add year checking in PRESUBMIT.py 2023-02-01 16:31:32 +00:00
README.dart-sdk Fix README.dart-sdk file to reflect current contents of the SDK 2023-02-02 03:10:09 +00:00
README.md
sdk_args.gni Fix typos 2022-06-15 11:08:28 +00:00
SECURITY.md Add link to published advisories 2022-02-08 19:45:07 +00:00
WATCHLISTS Create a watchlist for analyzer 2023-02-08 22:21:49 +00:00

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.