mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-06-08 13:37:10 +09:00
6530f55f34
Saves us two NativeFunction allocations per each `await`.
With this change, following function goes 80% faster on my computer:
```js
(async () => {
const resolved = Promise.resolve();
for (let i = 0; i < 5_000_000; i++) {
await resolved;
}
})();
```
42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
/*
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* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibJS/Bytecode/Interpreter.h>
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#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
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#include <LibJS/Runtime/GeneratorObject.h>
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#include <LibJS/Runtime/Object.h>
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#include <LibJS/Runtime/Promise.h>
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namespace JS {
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class AsyncFunctionDriverWrapper final : public Promise {
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JS_OBJECT(AsyncFunctionDriverWrapper, Promise);
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GC_DECLARE_ALLOCATOR(AsyncFunctionDriverWrapper);
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public:
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[[nodiscard]] static GC::Ref<Promise> create(Realm&, GeneratorObject*);
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virtual ~AsyncFunctionDriverWrapper() override = default;
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void visit_edges(Cell::Visitor&) override;
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void continue_async_execution(VM&, Value, bool is_successful);
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private:
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AsyncFunctionDriverWrapper(Realm&, GC::Ref<GeneratorObject>, GC::Ref<Promise> top_level_promise);
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ThrowCompletionOr<void> await(Value);
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GC::Ref<GeneratorObject> m_generator_object;
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GC::Ref<Promise> m_top_level_promise;
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GC::Ptr<Promise> m_current_promise { nullptr };
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OwnPtr<ExecutionContext> m_suspended_execution_context;
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GC::Ptr<NativeFunction> m_on_fulfilled;
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GC::Ptr<NativeFunction> m_on_rejected;
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};
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}
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