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ladybird/Userland/Libraries/LibJS/Runtime/Intrinsics.h
Andreas Kling f47a14b9d6 LibJS: Use a premade shape when creating iterator result objects 
Instead of going through the steps of creating an empty new object,
and adding two properties ("value" and "done") to it, we can pre-bake
a shape object and cache the property offsets.

This makes creating iterator result objects in the runtime much faster.

47% speedup on this microbenchmark:

    function go(a) {
        for (const p of a) {
        }
    }
    const a = [];
    a.length = 1_000_000;
    go(a);
2023-12-08 00:54:05 +01:00

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/*
* Copyright (c) 2022-2023, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibJS/Forward.h>
#include <LibJS/Heap/Cell.h>
namespace JS {
class Intrinsics final : public Cell {
JS_CELL(Intrinsics, Cell);
JS_DECLARE_ALLOCATOR(Intrinsics);
public:
static ThrowCompletionOr<NonnullGCPtr<Intrinsics>> create(Realm&);
NonnullGCPtr<Shape> empty_object_shape() { return *m_empty_object_shape; }
NonnullGCPtr<Shape> new_object_shape() { return *m_new_object_shape; }
NonnullGCPtr<Shape> new_ordinary_function_prototype_object_shape() { return *m_new_ordinary_function_prototype_object_shape; }
[[nodiscard]] NonnullGCPtr<Shape> iterator_result_object_shape() { return *m_iterator_result_object_shape; }
[[nodiscard]] u32 iterator_result_object_value_offset() { return m_iterator_result_object_value_offset; }
[[nodiscard]] u32 iterator_result_object_done_offset() { return m_iterator_result_object_done_offset; }
// Not included in JS_ENUMERATE_NATIVE_OBJECTS due to missing distinct prototype
NonnullGCPtr<ProxyConstructor> proxy_constructor() { return *m_proxy_constructor; }
// Not included in JS_ENUMERATE_NATIVE_OBJECTS due to missing distinct constructor
NonnullGCPtr<Object> async_from_sync_iterator_prototype() { return *m_async_from_sync_iterator_prototype; }
NonnullGCPtr<Object> async_generator_prototype() { return *m_async_generator_prototype; }
NonnullGCPtr<Object> generator_prototype() { return *m_generator_prototype; }
NonnullGCPtr<Object> wrap_for_valid_iterator_prototype() { return *m_wrap_for_valid_iterator_prototype; }
// Alias for the AsyncGenerator Prototype Object used by the spec (%AsyncGeneratorFunction.prototype.prototype%)
NonnullGCPtr<Object> async_generator_function_prototype_prototype() { return *m_async_generator_prototype; }
// Alias for the Generator Prototype Object used by the spec (%GeneratorFunction.prototype.prototype%)
NonnullGCPtr<Object> generator_function_prototype_prototype() { return *m_generator_prototype; }
// Not included in JS_ENUMERATE_INTL_OBJECTS due to missing distinct constructor
NonnullGCPtr<Object> intl_segments_prototype() { return *m_intl_segments_prototype; }
// Global object functions
NonnullGCPtr<FunctionObject> eval_function() const { return *m_eval_function; }
NonnullGCPtr<FunctionObject> is_finite_function() const { return *m_is_finite_function; }
NonnullGCPtr<FunctionObject> is_nan_function() const { return *m_is_nan_function; }
NonnullGCPtr<FunctionObject> parse_float_function() const { return *m_parse_float_function; }
NonnullGCPtr<FunctionObject> parse_int_function() const { return *m_parse_int_function; }
NonnullGCPtr<FunctionObject> decode_uri_function() const { return *m_decode_uri_function; }
NonnullGCPtr<FunctionObject> decode_uri_component_function() const { return *m_decode_uri_component_function; }
NonnullGCPtr<FunctionObject> encode_uri_function() const { return *m_encode_uri_function; }
NonnullGCPtr<FunctionObject> encode_uri_component_function() const { return *m_encode_uri_component_function; }
NonnullGCPtr<FunctionObject> escape_function() const { return *m_escape_function; }
NonnullGCPtr<FunctionObject> unescape_function() const { return *m_unescape_function; }
// Namespace/constructor object functions
NonnullGCPtr<FunctionObject> array_prototype_values_function() const { return *m_array_prototype_values_function; }
NonnullGCPtr<FunctionObject> date_constructor_now_function() const { return *m_date_constructor_now_function; }
NonnullGCPtr<FunctionObject> json_parse_function() const { return *m_json_parse_function; }
NonnullGCPtr<FunctionObject> json_stringify_function() const { return *m_json_stringify_function; }
NonnullGCPtr<FunctionObject> object_prototype_to_string_function() const { return *m_object_prototype_to_string_function; }
NonnullGCPtr<FunctionObject> throw_type_error_function() const { return *m_throw_type_error_function; }
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
NonnullGCPtr<ConstructorName> snake_name##_constructor(); \
NonnullGCPtr<Object> snake_name##_prototype();
JS_ENUMERATE_BUILTIN_TYPES
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
NonnullGCPtr<Intl::ConstructorName> intl_##snake_name##_constructor(); \
NonnullGCPtr<Object> intl_##snake_name##_prototype();
JS_ENUMERATE_INTL_OBJECTS
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
NonnullGCPtr<Temporal::ConstructorName> temporal_##snake_name##_constructor(); \
NonnullGCPtr<Object> temporal_##snake_name##_prototype();
JS_ENUMERATE_TEMPORAL_OBJECTS
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name) \
NonnullGCPtr<ClassName> snake_name##_object();
JS_ENUMERATE_BUILTIN_NAMESPACE_OBJECTS
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name) \
NonnullGCPtr<Object> snake_name##_prototype() \
{ \
return *m_##snake_name##_prototype; \
}
JS_ENUMERATE_ITERATOR_PROTOTYPES
#undef __JS_ENUMERATE
private:
Intrinsics(Realm& realm)
: m_realm(realm)
{
}
virtual void visit_edges(Visitor&) override;
ThrowCompletionOr<void> initialize_intrinsics(Realm&);
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
void initialize_##snake_name();
JS_ENUMERATE_BUILTIN_TYPES
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
void initialize_intl_##snake_name();
JS_ENUMERATE_INTL_OBJECTS
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
void initialize_temporal_##snake_name();
JS_ENUMERATE_TEMPORAL_OBJECTS
#undef __JS_ENUMERATE
NonnullGCPtr<Realm> m_realm;
GCPtr<Shape> m_empty_object_shape;
GCPtr<Shape> m_new_object_shape;
GCPtr<Shape> m_new_ordinary_function_prototype_object_shape;
GCPtr<Shape> m_iterator_result_object_shape;
u32 m_iterator_result_object_value_offset { 0 };
u32 m_iterator_result_object_done_offset { 0 };
// Not included in JS_ENUMERATE_NATIVE_OBJECTS due to missing distinct prototype
GCPtr<ProxyConstructor> m_proxy_constructor;
// Not included in JS_ENUMERATE_NATIVE_OBJECTS due to missing distinct constructor
GCPtr<Object> m_async_from_sync_iterator_prototype;
GCPtr<Object> m_async_generator_prototype;
GCPtr<Object> m_generator_prototype;
GCPtr<Object> m_wrap_for_valid_iterator_prototype;
// Not included in JS_ENUMERATE_INTL_OBJECTS due to missing distinct constructor
GCPtr<Object> m_intl_segments_prototype;
// Global object functions
GCPtr<FunctionObject> m_eval_function;
GCPtr<FunctionObject> m_is_finite_function;
GCPtr<FunctionObject> m_is_nan_function;
GCPtr<FunctionObject> m_parse_float_function;
GCPtr<FunctionObject> m_parse_int_function;
GCPtr<FunctionObject> m_decode_uri_function;
GCPtr<FunctionObject> m_decode_uri_component_function;
GCPtr<FunctionObject> m_encode_uri_function;
GCPtr<FunctionObject> m_encode_uri_component_function;
GCPtr<FunctionObject> m_escape_function;
GCPtr<FunctionObject> m_unescape_function;
// Namespace/constructor object functions
GCPtr<FunctionObject> m_array_prototype_values_function;
GCPtr<FunctionObject> m_date_constructor_now_function;
GCPtr<FunctionObject> m_json_parse_function;
GCPtr<FunctionObject> m_json_stringify_function;
GCPtr<FunctionObject> m_object_prototype_to_string_function;
GCPtr<FunctionObject> m_throw_type_error_function;
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
GCPtr<ConstructorName> m_##snake_name##_constructor; \
GCPtr<Object> m_##snake_name##_prototype;
JS_ENUMERATE_BUILTIN_TYPES
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
GCPtr<Intl::ConstructorName> m_intl_##snake_name##_constructor; \
GCPtr<Object> m_intl_##snake_name##_prototype;
JS_ENUMERATE_INTL_OBJECTS
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
GCPtr<Temporal::ConstructorName> m_temporal_##snake_name##_constructor; \
GCPtr<Object> m_temporal_##snake_name##_prototype;
JS_ENUMERATE_TEMPORAL_OBJECTS
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name) \
GCPtr<ClassName> m_##snake_name##_object;
JS_ENUMERATE_BUILTIN_NAMESPACE_OBJECTS
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name) \
GCPtr<Object> m_##snake_name##_prototype;
JS_ENUMERATE_ITERATOR_PROTOTYPES
#undef __JS_ENUMERATE
};
void add_restricted_function_properties(FunctionObject&, Realm&);
}
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