AWS is definitely the worst value on-demand. Their Turin is the best they can do, while their previous gen and older CPUs are the worst values on the table. Unlike the previous comparison, even Azure seems to do better in value.
其实根本不需要覆盖所有功能，把核心场景做到极致就足矣了。
，更多细节参见新收录的资料
example programs。业内人士推荐新收录的资料作为进阶阅读
This sounds reasonable until you see how easily it goes wrong: