Alexander Markov
86641d07ae
Previously, generated bytecode was cached using metadata in kernel AST. When serializaing kernel AST (for subsequent compilations) incremental serialization was not used, so AST serialization was considerably slower in bytecode mode compared to non-bytecode mode. Apparently, metadata is not compatible with incremental serialization (https://github.com/dart-lang/sdk/issues/39302). This change reimplements caching of generated bytecode using a separate 'foo.dill.cache' file near the generated 'foo.dill' and 'foo.dill.ast'. AST is now written using incremental serialization both in bytecode and non-bytecode modes. flutter_test_performance benchmark: AST mode: "without_change_elapsed_time_ms": 2615-2652, "implementation_change_elapsed_time_ms": 6292-6394, "interface_change_elapsed_time_ms": 6183-6484, "with_coverage_time_ms": 2723-2834 Bytecode mode, before this change: "without_change_elapsed_time_ms": 3246-3295, "implementation_change_elapsed_time_ms": 7998-8068, "interface_change_elapsed_time_ms": 7899-8029, "with_coverage_time_ms": 3316-3378 Bytecode mode, after this change: "without_change_elapsed_time_ms": 2689-2737, "implementation_change_elapsed_time_ms": 7630-7677, "interface_change_elapsed_time_ms": 7724-7917, "with_coverage_time_ms": 2841-2949 Change-Id: I603d33f49949146cf6620226d810f2f3cb9853a9 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/124592 Reviewed-by: Ryan Macnak <rmacnak@google.com> Commit-Queue: Alexander Markov <alexmarkov@google.com>
Dart
A client-optimized language for fast apps on any platform
Dart is:
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Optimized for UI: Develop with a programming language specialized around the needs of user interface creation
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Productive: Make changes iteratively: use hot reload to see the result instantly in your running app
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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:
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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.
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Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).
License & patents
Dart is free and open source.
See LICENSE and PATENT_GRANT.
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.