Hmm, are you sure? Vue actually performs only 1 move call for the scenario you described.

@yyx990803 Code below is the scenario I described, you can have a try. I put a console.log in move, it's printed seven times.

import Vue from "vue"

var app = new Vue({
  el: "#content",
  data: {
    list: [
      {name: "a"},
      {name: "b"},
      {name: "c"},
      {name: "d"},
      {name: "e"},
      {name: "f"},
      {name: "g"},
      {name: "h"}
    ]
  }
})

setTimeout(function() {
  app.list = [
    {name: "b"},
    {name: "c"},
    {name: "d"},
    {name: "e"},
    {name: "f"},
    {name: "g"},
    {name: "h"},
    {name: "a"}
  ]
}, 2333)

  <div id="content">
    <div v-for="item in list" track-by="name">
      {{item.name}}
    </div>
  </div>

Here is the case perform 1 move:

import Vue from "vue"

var app = new Vue({
  el: "#content",
  data: {
    list: [
      {name: "a"},
      {name: "b"},
      {name: "c"},
      {name: "d"},
      {name: "e"},
      {name: "f"},
      {name: "g"},
      {name: "h"}
    ]
  }
})

setTimeout(function() {
  app.list = [
    {name: "h"},
    {name: "a"},
    {name: "b"},
    {name: "c"},
    {name: "d"},
    {name: "e"},
    {name: "f"},
    {name: "g"}
  ]
}, 2333)

@livoras you are replacing the entire list with fresh objects, therefore Vue is removing all old fragments and inserting all the new ones. In fact neither of your examples should call move. Both should call remove and insert 8 times.

If you add proper identity tracking with track-by="name", then you should see 1 move call in both cases.

@yyx990803 yes，I added track-by="name". I've shown it in my previous comment:

  <div id="content">
    <div v-for="item in list" track-by="name">
      {{item.name}}
    </div>
  </div>

I tested your exact code locally and got 1 move call. If it's making 7 calls for you, please provide a live demo...

Ah sorry, I was looking at the second snippet. Yes it is indeed making 7 calls.

@livoras thanks a lot for the suggestion! It actually optimizes all scenarios when only a single item is moved.

@yyx990803 Great job~! 👍 move now is only called once.

It actually optimizes scenarios that non-adjacent items are moved. :)