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Memory leak when using "transition" and "keep-alive" #9842

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Aaron-Bird opened this issue Apr 7, 2019 · 6 comments · Fixed by #12015
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Memory leak when using "transition" and "keep-alive" #9842

Aaron-Bird opened this issue Apr 7, 2019 · 6 comments · Fixed by #12015
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@Aaron-Bird
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Aaron-Bird commented Apr 7, 2019 •
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Version

2.6.10

Reproduction link

https://codepen.io/aaronbird/pen/JVRKwa

Steps to reproduce

I wrote a demo:

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>demo</title>
    <style>
      .link {
        cursor: pointer;
        user-select: none;
      }
    </style>
  </head>
  <body>
    <script src="https://unpkg.com/vue/dist/vue.js"></script>

    <div id="app">
      <transition>
        <keep-alive include="foo">
          <component :is="target" @change="onChange"></component>
        </keep-alive>
      </transition>
    </div>
    <script>
      const Foo = {
        name: "foo",
        template: `<div class="link" @click="$emit('change', 'bar')">Go to Bar</div>`
      };
      const Bar = {
        name: "bar",
        template: `<div class="link" @click="$emit('change', 'foo')">Go to Foo</div>`
      };
      Vue.component("foo", Foo);
      Vue.component("bar", Bar);
      const app = new Vue({
        data: {
          target: "foo"
        },
        methods: {
          onChange(target) {
            this.target = target;
          }
        }
      }).$mount("#app");
    </script>
  </body>
</html>

The debugging process is as follows:
1 Click "Collect garbage" and "Take heap snapshot"(snapshot 1)
2 Click the routing button on the left 10 times, then click "Collect garbage" and "Take heap snapshot"(snapshot 2)
3 Click the routing button on the left 10 times, then click "Collect garbage" and "Take heap snapshot"(snapshot 3)

The generated "snapshot" is as follows:

snapshot 1:

snapshot 2:

snapshot 3:

After clicking 100 times:

VueComponent is not being recycled, is this a bug?

What is expected?

Why is this happening, is this a bug?

What is actually happening?

Component will not be cleared when switching components.
@posva posva added the bug label Apr 8, 2019
@dejour
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dejour commented Apr 10, 2019

I will take a look this.

@dejour
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dejour commented Apr 13, 2019 •
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All component is retained by cached vnode’s parent，if we delete parent. then components are recycled.Will dig more

@dejour dejour mentioned this issue Apr 15, 2019
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@zrh122 zrh122 mentioned this issue May 1, 2019
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@posva posva added the has PR label May 14, 2019
@vuejs vuejs deleted a comment from hunson1990 Jul 1, 2019
This was referenced Oct 4, 2019
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@tmorehouse tmorehouse mentioned this issue Oct 7, 2019
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@sprocket99
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I also have a memory leak issue, please see : bootstrap-vue/bootstrap-vue#4214

I tried to make a jsfiddle but not sure how to replicate the caching behaviour.

@lidc-01 lidc-01 mentioned this issue Oct 28, 2019
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@sky8ez
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sky8ez commented Jan 6, 2020

Hey, is there any news? is this updates already merged to master branch ? I have the same problem.

@kadet1090
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I'd really love to see any update on this issue - there is PR but it seems dead?

@rocka rocka mentioned this issue Apr 1, 2020
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@posva posva mentioned this issue Apr 16, 2021
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@lvjiaxuan
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It didn't fixed. Oh m g.

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@posva @kadet1090 @dejour @lvjiaxuan @sky8ez @Aaron-Bird @sprocket99