When the recalculated values of the dependent computed properties have not changed, the calculated properties of all dependent are recalculated. #8751
Description
What problem does this feature solve?
Sorry, the following content is not translated accurately, so use Chinese.
当程序中出现链式计算属性依赖时，我们可能希望的是仅当被依赖的计算属性变更时，它所依赖的计算属性才会重新去计算。而不是因为被依赖的计算属性重新计算链了，所以所有依赖它的计算属性都要重新计算。这样在链式的依赖的计算属性中，可以节省很多计算工作。
What does the proposed API look like?
仅当被依赖的计算属性变更时，它所依赖的计算属性才会重新去计算。