我使用的是Nuxt v2.13和Vuetify v2,默认布局中也使用了keep-alive。随着我的应用越来越大,我越来越注意到内存问题,以至于我的应用需要至少4GB的内存才能在云服务器上正常运行。我四处挖掘,发现了一些零散的碎片,所以决定分享它们并讨论解决方案。
请根据#编号回答每个问题
**#1 - NuxtLink(vue-router)内存泄漏:**其他人发现vue-router中可能存在泄漏;另外,因为nuxt-link关联的DOM将被预取,所以内存的使用率也可能很高。因此有人建议使用html锚来代替nuxt-link,如下所示:
<template>
<a href="/mypage" @click.prevent="goTo('mypage')">my page link</a>
</template>
<script>
export default{
methods:{
goTo(link){
this.$router.push(link)
}
}
}
</script>
您对这种方法有何看法??Vuetify to
props像nuxt-link一样工作,您对此有何看法?
<template>
<v-card to="/mypage" ></v-card>
</template>
**#2 -动态组件加载:**由于我的应用是双向的,并且可以通过.env
文件进行定制,因此我不得不动态、有条件地延迟加载我的许多组件,如下所示:
<template>
<component :is="mycomp" />
</template>
<script>
export default{
computed:{
mycomp(){
return import()=>(`@/components/${process.env.SITE_DIR}/mycomp.vue`)
}
}
}
</script>
这是否会导致高内存使用率/泄漏?
**# 3 - Nuxt事件总线:**除了我的组件中的正常this.$emit()
之外,有时我不得不使用$nuxt.$emit()
。我在beforeDestroy
挂钩中删除它们:
<script>
export default{
created:{
this.$nuxt.$on('myevent', ()=>{
// do something
}
},
beforeDestroy(){
this.$nuxt.$off('myevent')
}
}
</script>
但是有人告诉我,created
钩子上的侦听器将是SSR,并且不会在CSR beforeDestroy
钩子中删除。那么我应该怎么做?将if(process.client){}
添加到created
??
**# 4 -全局插件:**我发现了这个问题,也发现了这个文档。我在全局添加了我的插件/包,就像这个问题中提到的那样。那么vue.use()
是个问题吗?我应该使用inject
吗?怎么做?
// vue-product-zoomer package
import Vue from 'vue'
import ProductZoomer from 'vue-product-zoomer'
Vue.use(ProductZoomer)
**# 5 - Vee Validate泄漏:**我在这里读到过,这真的会导致泄漏吗?我使用的是Vee Validate v3:
我的veevalidate.js已全局添加到nuxt.config.js
import Vue from 'vue'
import { ValidationObserver, ValidationProvider, setInteractionMode } from 'vee-validate'
import { localize } from 'vee-validate';
import en from 'vee-validate/dist/locale/en.json';
import fa from 'vee-validate/dist/locale/fa.json';
localize({
en,
fa
});
setInteractionMode('eager')
let LOCALE = "fa";
Object.defineProperty(Vue.prototype, "locale", {
configurable: true,
get() {
return LOCALE;
},
set(val) {
LOCALE = val;
localize(val);
}
});
Vue.component('ValidationProvider', ValidationProvider);
Vue.component("ValidationObserver", ValidationObserver);
我添加到每个页面/组件veevalidate混合器使用了veevalidate。(我使用混合器是因为我需要使用我的vuex状态lang
)
import { required, email , alpha , alpha_spaces , numeric , confirmed , password } from 'vee-validate/dist/rules'
import { extend } from 'vee-validate'
export default {
mounted() {
extend("required", {
...required,
message: `{_field_} ${this.lang.error_required}`
});
extend("email", {
...email,
message: `{_field_} ${this.lang.error_email}`
});
extend("alpha", {
...alpha,
message: `{_field_} ${this.lang.error_alpha}`
});
extend("alpha_spaces", {
...alpha_spaces,
message: `{_field_} ${this.lang.error_alpha_spaces}`
});
extend("numeric", {
...numeric,
message: `{_field_} ${this.lang.error_numeric}`
});
extend("confirmed", {
...confirmed,
message: `{_field_} ${this.lang.error_confirmed}`
});
extend("decimal", {
validate: (value, { decimals = '*', separator = '.' } = {}) => {
if (value === null || value === undefined || value === '') {
return {
valid: false
};
}
if (Number(decimals) === 0) {
return {
valid: /^-?\d*$/.test(value),
};
}
const regexPart = decimals === '*' ? '+' : `{1,${decimals}}`;
const regex = new RegExp(`^[-+]?\\d*(\\${separator}\\d${regexPart})?([eE]{1}[-]?\\d+)?$`);
return {
valid: regex.test(value),
};
},
message: `{_field_} ${this.lang.error_decimal}`
})
}
}
**# 6 -保持活动:**正如我之前提到的,我在我的应用程序中使用了保持活动,它会缓存许多内容,并且可能不会破坏/删除插件和事件侦听器。
**#7- setTimeout:**是否需要使用clearTimeout来做数据清除??
**# 8 -删除插件/软件包:**在this Doc中提到了一些插件/软件包即使在组件被破坏后也不会被删除,我怎么才能找到它们呢?
这是我包和nuxt.config
// package.json
{
"name": "nuxt",
"version": "1.0.0",
"private": true,
"scripts": {
"dev": "nuxt",
"build": "nuxt build",
"start": "nuxt start",
"generate": "nuxt generate"
},
"dependencies": {
"@nuxt/http": "^0.6.0",
"@nuxtjs/auth": "^4.9.1",
"@nuxtjs/axios": "^5.11.0",
"@nuxtjs/device": "^1.2.7",
"@nuxtjs/google-gtag": "^1.0.4",
"@nuxtjs/gtm": "^2.4.0",
"chart.js": "^2.9.3",
"cookie-universal-nuxt": "^2.1.4",
"jquery": "^3.5.1",
"less-loader": "^6.1.2",
"nuxt": "^2.13.0",
"nuxt-user-agent": "^1.2.2",
"v-viewer": "^1.5.1",
"vee-validate": "^3.3.7",
"vue-chartjs": "^3.5.0",
"vue-cropperjs": "^4.1.0",
"vue-easy-dnd": "^1.10.2",
"vue-glide-js": "^1.3.14",
"vue-persian-datetime-picker": "^2.2.0",
"vue-product-zoomer": "^3.0.1",
"vue-slick-carousel": "^1.0.6",
"vue-sweetalert2": "^3.0.5",
"vue2-editor": "^2.10.2",
"vuedraggable": "^2.24.0",
"vuetify": "^2.3.9"
},
"devDependencies": {
"@fortawesome/fontawesome-free": "^5.15.1",
"@mdi/font": "^5.9.55",
"@nuxtjs/dotenv": "^1.4.1",
"css-loader": "^3.6.0",
"flipclock": "^0.10.8",
"font-awesome": "^4.7.0",
"node-sass": "^4.14.1",
"noty": "^3.2.0-beta",
"nuxt-gsap-module": "^1.2.1",
"sass-loader": "^8.0.2"
}
}
//nuxt.config.js
const env = require('dotenv').config()
const webpack = require('webpack')
export default {
mode: 'universal',
loading: {
color: 'green',
failedColor: 'red',
height: '3px'
},
router: {
// base: process.env.NUXT_BASE_URL || '/'
},
head: {
title: process.env.SITE_TITLE + ' | ' + process.env.SITE_SHORT_DESC || '',
meta: [
{ charset: 'utf-8' },
{ name: 'viewport', content: 'width=device-width, initial-scale=1' },
{ hid: 'keywords', name: 'keywords', content: process.env.SITE_KEYWORDS || '' },
{ hid: 'description', name: 'description', content: process.env.SITE_DESCRIPTION || '' },
{ hid: 'robots', name: 'robots', content: process.env.SITE_ROBOTS || '' },
{ hid: 'googlebot', name: 'googlebot', content: process.env.SITE_GOOGLE_BOT || '' },
{ hid: 'bingbot', name: 'bingbot', content: process.env.SITE_BING_BOT || '' },
{ hid: 'og:locale', name: 'og:locale', content: process.env.SITE_OG_LOCALE || '' },
{ hid: 'og:type', name: 'og:type', content: process.env.SITE_OG_TYPE || '' },
{ hid: 'og:title', name: 'og:title', content: process.env.SITE_OG_TITLE || '' },
{ hid: 'og:description', name: 'og:description', content: process.env.SITE_OG_DESCRIPTION || '' },
{ hid: 'og:url', name: 'og:url', content: process.env.SITE_OG_URL || '' },
{ hid: 'og:site_name', name: 'og:site_name', content: process.env.SITE_OG_SITENAME || '' },
{ hid: 'theme-color', name: 'theme-color', content: process.env.SITE_THEME_COLOR || '' },
{ hid: 'msapplication-navbutton-color', name: 'msapplication-navbutton-color', content: process.env.SITE_MSAPP_NAVBTN_COLOR || '' },
{ hid: 'apple-mobile-web-app-status-bar-style', name: 'apple-mobile-web-app-status-bar-style', content: process.env.SITE_APPLE_WM_STATUSBAR_STYLE || '' },
{ hid: 'X-UA-Compatible', 'http-equiv': 'X-UA-Compatible', content: process.env.SITE_X_UA_Compatible || '' }
],
link: [
{ rel: 'icon', type: 'image/x-icon', href: process.env.SITE_FAVICON },
// { rel: 'shortcut icon', type: 'image/x-icon', href: process.env.SITE_FAVICON },
{ rel: 'canonical', href: process.env.SITE_REL_CANONICAL },
// { rel: 'stylesheet', href: 'https://cdn.jsdelivr.net/npm/font-awesome@4.x/css/font-awesome.min.css' },
]
},
css: [
'~/assets/scss/style.scss',
'~/assets/scss/media.scss',
'~/assets/scss/customization.scss',
'~/assets/scss/sweetalert.scss',
'~/assets/scss/noty.scss',
'~/assets/scss/flipclock.scss',
'~/assets/scss/glide.scss',
'~/assets/scss/sorting.scss',
'~/assets/scss/cropper.scss',
'~/assets/scss/transitions.scss',
'~/assets/scss/product-zoom.scss',
'vue-slick-carousel/dist/vue-slick-carousel.css'
],
plugins: [
'plugins/mixins/reqerrors.js',
'plugins/mixins/user.js',
'plugins/mixins/language.js',
'plugins/mixins/shopinfo.js',
'plugins/mixins/formattedprice.js',
'plugins/mixins/utils.js',
'plugins/mixins/cms.js',
'plugins/mixins/client.js',
'plugins/mixins/cart.js',
'plugins/axios.js',
'plugins/veevalidate.js',
'plugins/noty.js',
'plugins/glide.js',
'@plugins/vuetify',
'@plugins/vuedraggable',
'@plugins/vuedraggable',
'@plugins/vue-slick-carousel.js',
{src: 'plugins/vuepersiandatepicker.js', mode: 'client'},
{src: 'plugins/cropper.js', mode: 'client'},
{src: 'plugins/vue-product-zoomer.js', mode: 'client'},
{src: 'plugins/vueeditor.js', mode: 'client'},
],
buildModules: [
'@nuxtjs/dotenv',
'nuxt-gsap-module'
],
modules: [
'@nuxtjs/axios',
'@nuxtjs/auth',
'@nuxtjs/device',
['vue-sweetalert2/nuxt',
{
confirmButtonColor: '#29BF12',
cancelButtonColor: '#FF3333'
}
],
'cookie-universal-nuxt',
'@nuxtjs/gtm',
'@nuxtjs/google-gtag',
'nuxt-user-agent',
],
gtm: {
id: process.env.GOOGLE_TAGS_ID,
debug: false
},
'google-gtag': {
id: process.env.GOOGLE_ANALYTICS_ID,
debug: false
},
gsap: {
extraPlugins: {
cssRule: false,
draggable: false,
easel: false,
motionPath: false,
pixi: false,
text: false,
scrollTo: false,
scrollTrigger: false
},
extraEases: {
expoScaleEase: false,
roughEase: false,
slowMo: true,
}
},
axios: {
baseURL: process.env.BASE_URL,
},
auth: {
strategies: {
local: {
endpoints: {
login: { url: 'auth/login', method: 'post', propertyName: 'token' },
logout: { url: 'auth/logout', method: 'post' },
user: { url: 'auth/info', method: 'get', propertyName: '' }
}
}
},
redirect: {
login: '/login',
home: '',
logout: '/login'
},
cookie: {
prefix: 'auth.',
options: {
path: '/',
maxAge: process.env.AUTH_COOKIE_MAX_AGE
}
}
},
publicRuntimeConfig: {
gtm: {
id: process.env.GOOGLE_TAGS_ID
},
'google-gtag': {
id: process.env.GOOGLE_ANALYTICS_ID,
}
},
build: {
transpile: ['vee-validate/dist/rules'],
plugins: [
new webpack.ProvidePlugin({
'$': 'jquery',
jQuery: "jquery",
"window.jQuery": "jquery",
'_': 'lodash'
}),
new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/)
],
postcss: {
preset: {
features: {
customProperties: false,
},
},
},
loaders: {
scss: {
prependData: `$theme_colors: ("theme_body_color":"${process.env.THEME_BODY_COLOR}","theme_main_color":"${process.env.THEME_MAIN_COLOR}","theme_main_color2":"${process.env.THEME_MAIN_COLOR2}","theme_side_color":"${process.env.THEME_SIDE_COLOR}","theme_side_color2":"${process.env.THEME_SIDE_COLOR2}","theme_link_color":"${process.env.THEME_LINK_COLOR}");`
}
},
}
}
2条答案
按热度按时间tcomlyy61#
我想是时候分享我的理解了(尽管它很小):
1作为
vue-router
使用预取可能会有大量的内存使用取决于链接的数量。在我的情况下,没有太多,所以我让他们,也有一个选项,以禁用预取在nuxt所以如果你的应用是超级忙碌或你有数百个链接在一个单一的页面更好地禁用预取:2我没有发现动态组件有任何问题
3没有使用
$nuxt.$on
,但我在created
挂钩中使用window.addEventListener
时遇到了这种情况(事件侦听器未被删除)。因此,最好尽可能将所有侦听器移到客户端(beforeMount或mounted)4正如我在上面的评论中提到的,我尽可能多地删除了全局插件/css,以获得更轻的init,并在本地使用它们,但关于
Vue.use()
内存泄漏,这是我的误解!!不要使用Vue.use()、Vue.component(),全局不要在这个函数里面插入任何东西,专门用于Nuxt注入,会造成服务器端内存泄漏。
因此使用
Vue.use()
内部注入函数可能会导致内存泄漏而不是Vue.use()
本身。至于其他人还没有回答
gxwragnw2#
6是一个糟糕的选择。Keep-alive是一个可以以某种方式使用的引擎。组件级别和路径级别的缓存也可以减少RAM的使用。4GB的RAM是用于某些事情的,我们需要更深入的知识。
7在未来是的-将有更多的优化作为框架的一部分,然后渐进的性质。
8来自文档
Vue应用程序中的内存泄漏通常不是来自Vue本身,而是在将其他库合并到应用程序中时发生。
这就是为什么它很难诊断的原因。您可以使用“性能”选项卡来查找泄漏数据的脚本,因为这是所述问题的一部分。第二部分是缓存(localCache、sessionCache和ServiceWorker),因此描述删除脚本的简单方法是不可行的。
最重要的是:vue的作用域是一个组件,因此这可以是一个策略,用于逐个禁用所有要诊断的内容。