When timeouts are expected, the cost of checking for null is lower than the cost of catching an exception.

当预料会超时的时候，检查是否为null的成本低于捕获异常的成本。

youdao

When timeouts are expected, the cost of checking for null is lower than the cost of catching an exception.

当预料会超时的时候，检查是否为null的成本低于捕获异常的成本。

youdao