Martin Kustermann
9edafc75f7
Static field initializers are only run once and as such are cold code. They should never be inlined into hot code that accesses the static field. Though right now `wasm-opt` will inline the static field initializers e.g. if there's only one use of a static field (as it makes size a bit smaller if we avoid the extra wasm function). That has the problem that it may inline cold code into hot code. That hot code in return then gets big and may not be allowed to be inlined into it's caller. One can instruct binaryen to only inline functions with one caller up to some size by passing `--one-caller-inline-max-function-size` (see [0]). Though that can regress size. So instead we specifically mark the function we know are cold to not be inlined, namely static field initializer functions above a certain size. This changes performance of a benchmark from [1] from cascadeUnhoisted: 390000 us to cascadeUnhoisted: 138000 us NOTE: This will cause some size regressions for e.g. e main module by 0.4-0.5% - but seems to be the right thing to do. [0] https://github.com/WebAssembly/binaryen/issues/8619 [1] https://github.com/dart-lang/sdk/issues/63484 Change-Id: I626b8cd879a804aef638901ede190f74276d8e8b Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/509960 Reviewed-by: Srujan Gaddam <srujzs@google.com> Commit-Queue: Martin Kustermann <kustermann@google.com>
Dart
An approachable, portable, and productive language for high-quality apps on any platform
Dart is:
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Approachable: Develop with a strongly typed programming language that is consistent, concise, and offers modern language features like null safety and patterns.
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Portable: Compile to ARM, x64, or RISC-V machine code for mobile, desktop, and backend. Compile to JavaScript or WebAssembly for the web.
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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:
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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).
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