mirror of
https://github.com/LadybirdBrowser/ladybird.git
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d45f8a3081
We already had IC support in PutById for the following cases:
- Changing an existing own property
- Calling a setter located in the prototype chain
This was enough to speed up code where structurally identical objects
(same shape) are processed in a loop:
```js
const arr = [{ a: 1 }, { a: 2 }, { a: 3 }];
for (let obj of arr) {
obj.a += 1;
}
```
However, creating structurally identical objects in a loop was still
slow:
```js
for (let i = 0; i < 10_000_000; i++) {
const o = {};
o.a = 1;
o.b = 2;
o.c = 3;
}
```
This change addresses that by adding a new IC type that caches both the
source and target shapes, allowing property additions to be fast-pathed
by directly jumping to the shape that already includes the new property.
54 lines
2.3 KiB
C++
54 lines
2.3 KiB
C++
/*
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* Copyright (c) 2022, Linus Groh <linusg@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 <AK/Forward.h>
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#include <LibGC/Ptr.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Runtime/Object.h>
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#include <LibWeb/Export.h>
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#include <LibWeb/Forward.h>
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namespace Web::HTML {
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class WEB_API WindowProxy final : public JS::Object {
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JS_OBJECT(WindowProxy, JS::Object);
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GC_DECLARE_ALLOCATOR(WindowProxy);
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public:
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virtual ~WindowProxy() override = default;
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virtual JS::ThrowCompletionOr<JS::Object*> internal_get_prototype_of() const override;
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virtual JS::ThrowCompletionOr<bool> internal_set_prototype_of(Object* prototype) override;
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virtual JS::ThrowCompletionOr<bool> internal_is_extensible() const override;
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virtual JS::ThrowCompletionOr<bool> internal_prevent_extensions() override;
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virtual JS::ThrowCompletionOr<Optional<JS::PropertyDescriptor>> internal_get_own_property(JS::PropertyKey const&) const override;
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virtual JS::ThrowCompletionOr<bool> internal_define_own_property(JS::PropertyKey const&, JS::PropertyDescriptor&, Optional<JS::PropertyDescriptor>* precomputed_get_own_property = nullptr) override;
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virtual JS::ThrowCompletionOr<JS::Value> internal_get(JS::PropertyKey const&, JS::Value receiver, JS::CacheableGetPropertyMetadata*, PropertyLookupPhase) const override;
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virtual JS::ThrowCompletionOr<bool> internal_set(JS::PropertyKey const&, JS::Value value, JS::Value receiver, JS::CacheableSetPropertyMetadata*, PropertyLookupPhase) override;
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virtual JS::ThrowCompletionOr<bool> internal_delete(JS::PropertyKey const&) override;
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virtual JS::ThrowCompletionOr<GC::RootVector<JS::Value>> internal_own_property_keys() const override;
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GC::Ptr<Window> window() const { return m_window; }
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void set_window(GC::Ref<Window>);
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GC::Ref<BrowsingContext> associated_browsing_context() const;
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private:
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explicit WindowProxy(JS::Realm&);
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virtual bool is_html_window_proxy() const override { return true; }
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virtual void visit_edges(JS::Cell::Visitor&) override;
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// [[Window]], https://html.spec.whatwg.org/multipage/window-object.html#concept-windowproxy-window
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GC::Ptr<Window> m_window;
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};
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}
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template<>
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inline bool JS::Object::fast_is<Web::HTML::WindowProxy>() const { return is_html_window_proxy(); }
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