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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
43 lines
1.6 KiB
C++
43 lines
1.6 KiB
C++
/*
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* Copyright (c) 2020, Jack Karamanian <karamanian.jack@gmail.com>
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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/Completion.h>
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#include <LibJS/Runtime/FunctionObject.h>
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namespace JS {
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class BoundFunction final : public FunctionObject {
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JS_OBJECT(BoundFunction, FunctionObject);
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GC_DECLARE_ALLOCATOR(BoundFunction);
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public:
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static ThrowCompletionOr<GC::Ref<BoundFunction>> create(Realm&, FunctionObject& target_function, Value bound_this, Vector<Value> bound_arguments);
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virtual ~BoundFunction() override = default;
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virtual ThrowCompletionOr<Value> internal_call(ExecutionContext&, Value this_argument) override;
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virtual ThrowCompletionOr<GC::Ref<Object>> internal_construct(ReadonlySpan<Value> arguments_list, FunctionObject& new_target) override;
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virtual bool is_strict_mode() const override { return m_bound_target_function->is_strict_mode(); }
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virtual bool has_constructor() const override { return m_bound_target_function->has_constructor(); }
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FunctionObject& bound_target_function() const { return *m_bound_target_function; }
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Value bound_this() const { return m_bound_this; }
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Vector<Value> const& bound_arguments() const { return m_bound_arguments; }
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private:
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BoundFunction(Realm&, FunctionObject& target_function, Value bound_this, Vector<Value> bound_arguments, Object* prototype);
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virtual void visit_edges(Visitor&) override;
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GC::Ptr<FunctionObject> m_bound_target_function; // [[BoundTargetFunction]]
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Value m_bound_this; // [[BoundThis]]
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Vector<Value> m_bound_arguments; // [[BoundArguments]]
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};
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}
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