The key to performance is to keep the hot data in memory.

真正的痛苦不是来自外部，而是来自我们如何理解它。

There are no hard distinctions between what is real and what is unreal, nor between what is true and what is false. A thing is not necessarily either true or false; it can be both true and false.

你不仅要相信自己，还要相信你所做的事情。