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LibJS: Access function arguments directly in AST interpreter
Instead of doing a generic scoped variable lookup, function arguments now go directly to the call frame arguments list. This is a huge speedup on everything that uses arguments. :^)
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@ -1301,6 +1301,9 @@ Value Identifier::execute(Interpreter& interpreter, GlobalObject& global_object)
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{
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InterpreterNodeScope node_scope { interpreter, *this };
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if (m_argument_index.has_value())
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return interpreter.vm().argument(m_argument_index.value());
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auto value = interpreter.vm().get_variable(string(), global_object);
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if (value.is_empty()) {
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if (!interpreter.exception())
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