假设我有一个像这样的vuex商店...
state: {
docs: null,
adds: [],
deletes: [],
},
actions: {
// initialize docs to an array of objects
init (context, payload) {
}
}
getters: {
// get the docs plus the adds, minus the deletes
docs (state) {
}
},
mutations: {
// add a doc, keeping track that it was added
addDoc (state, payload) {
}
// remove a doc, keeping track that it was deleted
removeDoc (state, payload) {
}
}
我认为我有两种选择来实现:要么使设置程序上的docs数组发生突变,要么计算该方法在getter上的有效值。在反应性或性能方面,其中一个想法是否比另一个想法差很多?
换句话说:
// choice 1: really mutate the docs
addDoc (state, payload) {
state.adds = [...state.adds, ...payload]
state.docs = _.without([...state.docs, ...payload], state.deletes)
}
// choice 2: mutate the docs in effect, via the getter
addDoc (state, payload) {
state.adds = [...state.adds, ...payload]
}
// choice 2, in getter
docs(state) {
return _.without([...state.docs, ...payload], state.deletes)
}
假定不经常进行突变,并且频繁调用getter,我是否要为选择2付出计算上的损失?还是因为缓存了吸气剂的结果(我认为?),这两种方法真的差不多吗?这是一个抛硬币的路,还是我可以用来决定的原理? -谢谢
答案 0 :(得分:1)
嗯,是的,吸气剂被缓存了。所以在这种情况下,我猜是掷硬币。就个人而言,我更喜欢在吸气剂上进行计算。