[vm] Remove timer non-zero assertions. For some reason, these assertions fire when snapshots are trained on RBE inside a docker container. It's potentially a race condition if the timer resolution is low enough or RBE is lying about the time. However, there is no need to check if the start time is non-zero since there's already a running_ variable protecting against stopping times that haven't been started. TEST=CQ, locally, and on RBE Bug: b/296994239 Change-Id: I2a5b36d0b1cb9b939e94fe6aabb5f41fec077f2a Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/342401 Reviewed-by: Slava Egorov <vegorov@google.com> Commit-Queue: Jonas Termansen <sortie@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 on our wiki.
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.