commit | a4dd314c9e62b20ba7761910ffd9911fa2ac2435 | [log] [tgz] |
---|---|---|
author | Vyacheslav Egorov <vegorov@google.com> | Fri May 24 09:40:39 2024 |
committer | Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> | Fri May 24 09:40:39 2024 |
tree | f7804d090ee82d1153aa6ada3a56cf2c2058c2d7 | |
parent | 7dad9a6516d8ebdd855496b13f830aabb3fd7dc3 [diff] |
[tools] Allow precompiling gen_kernel and compile_platform When iterating on core library changes or changes in the AOT compiler many seconds are wasted waiting on gen_kernel/compile_platform to parse Dart code. This happens because we are running these tools from sources on prebuilt Dart SDK. This CL allows SDK developer to opt-in into AOT compiling these tools by adding `precompile_tools=true` to their DART_GN_ARGS. AOT compilation is performed using prebuilt SDK - so these executables do not need to be recompiled if core libraries or VM changes reducing iteration cycles. pkg/vm/tool/precompiler2 is tweaked to detect when DART_GN_ARGS contains `precompile_tools=true` and use precompiled gen_kernel.exe instead of running it from source. Using precompiled compile_platform takes vm_platform_strong.dill build from 20 seconds to 3 seconds. Using precompiled gen_kernel takes small benchmark build from ~10 seconds to 2 seconds. This relands 5cda2a871cf274a1943e56e208634055ea996598 with fixes for Flutter build. TEST=manually tested Change-Id: I552861c80c152890655e41baaf6ea3fb3b03a57e Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/367961 Reviewed-by: Martin Kustermann <kustermann@google.com> Commit-Queue: Slava Egorov <vegorov@google.com>
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 is free and open source.
See LICENSE and PATENT_GRANT.
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).
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.
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.
Future plans for Dart are included in the combined Dart and Flutter roadmap on the Flutter wiki.