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LibJS: Store ECMAScriptFunctionObject bytecode in an OwnPtr
Using an Optional was extremely wasteful for function objects that don't even have a bytecode executable. This allows ECMAScriptFunctionObject to fit in a smaller size class.
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8 changed files with 33 additions and 28 deletions
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@ -580,10 +580,10 @@ ThrowCompletionOr<Value> perform_eval(Value x, GlobalObject& caller_realm, Calle
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if (auto* bytecode_interpreter = Bytecode::Interpreter::current()) {
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auto executable = JS::Bytecode::Generator::generate(program);
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executable.name = "eval"sv;
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executable->name = "eval"sv;
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if (JS::Bytecode::g_dump_bytecode)
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executable.dump();
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eval_result = TRY(bytecode_interpreter->run(executable));
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executable->dump();
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eval_result = TRY(bytecode_interpreter->run(*executable));
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// Turn potentially empty JS::Value from the bytecode interpreter into an empty Optional
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if (eval_result.has_value() && eval_result->is_empty())
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eval_result = {};
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@ -775,7 +775,7 @@ Completion ECMAScriptFunctionObject::ordinary_call_evaluate_body()
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if (bytecode_interpreter) {
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// FIXME: pass something to evaluate default arguments with
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TRY(function_declaration_instantiation(nullptr));
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if (!m_bytecode_executable.has_value()) {
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if (!m_bytecode_executable) {
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m_bytecode_executable = Bytecode::Generator::generate(m_ecmascript_code, m_kind);
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m_bytecode_executable->name = m_name;
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auto& passes = JS::Bytecode::Interpreter::optimization_pipeline();
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@ -103,7 +103,7 @@ private:
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ThrowCompletionOr<void> function_declaration_instantiation(Interpreter*);
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FlyString m_name;
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Optional<Bytecode::Executable> m_bytecode_executable;
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OwnPtr<Bytecode::Executable> m_bytecode_executable;
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i32 m_function_length { 0 };
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// Internal Slots of ECMAScript Function Objects, https://tc39.es/ecma262/#table-internal-slots-of-ecmascript-function-objects
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