Local variables are faster to access than out-of-scope variables because they exist in the first variable object of the scope chain.

局部变量比域外变量快，因为它位于作用域链的第一个对象中。

youdao

Local variables are faster to access than out-of-scope variables because they exist in the first variable object of the scope chain.

局部变量比域外变量快，因为它位于作用域链的第一个对象中。

youdao