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a05be67e4a
Instead of letting every [[Call]] implementation allocate an ExecutionContext, we now make that a responsibility of the caller. The main point of this exercise is to allow the Call instruction to write function arguments directly into the callee ExecutionContext instead of copying them later. This makes function calls significantly faster: - 10-20% faster on micro-benchmarks (depending on argument count) - 4% speedup on Kraken - 2% speedup on Octane - 5% speedup on JetStream
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
/*
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* Copyright (c) 2021, 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 <LibJS/Runtime/FunctionObject.h>
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#include <LibJS/Runtime/Realm.h>
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namespace JS {
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class WrappedFunction final : public FunctionObject {
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JS_OBJECT(WrappedFunction, FunctionObject);
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GC_DECLARE_ALLOCATOR(WrappedFunction);
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public:
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static ThrowCompletionOr<GC::Ref<WrappedFunction>> create(Realm&, Realm& caller_realm, FunctionObject& target_function);
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virtual ~WrappedFunction() = default;
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virtual ThrowCompletionOr<Value> internal_call(ExecutionContext&, Value this_argument) override;
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virtual Realm* realm() const override { return m_realm; }
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FunctionObject const& wrapped_target_function() const { return m_wrapped_target_function; }
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FunctionObject& wrapped_target_function() { return m_wrapped_target_function; }
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virtual ThrowCompletionOr<void> get_stack_frame_size(size_t& registers_and_constants_and_locals_count, size_t& argument_count) override;
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private:
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WrappedFunction(Realm&, FunctionObject&, Object& prototype);
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virtual void visit_edges(Visitor&) override;
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// Internal Slots of Wrapped Function Exotic Objects, https://tc39.es/proposal-shadowrealm/#table-internal-slots-of-wrapped-function-exotic-objects
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GC::Ref<FunctionObject> m_wrapped_target_function; // [[WrappedTargetFunction]]
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GC::Ref<Realm> m_realm; // [[Realm]]
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};
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ThrowCompletionOr<Value> ordinary_wrapped_function_call(WrappedFunction&, Value this_argument, Span<Value> arguments_list);
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void prepare_for_wrapped_function_call(WrappedFunction&, ExecutionContext& callee_context);
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}
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