How to adjust vue double speed

With the development of front-end technology and the performance improvement of native browsers, web applications are getting faster and faster. However, when using the Vue framework to build web applications, you sometimes feel that the web page loads slowly and the page renders slowly. At this time, we can use Vue's double-speed compilation to improve page rendering speed to achieve a better user experience.

Vue 2.X version provides two compilation modes: standard compilation mode and double-speed compilation mode. The standard compilation mode is Vue's default compilation mode. It compiles the template into a rendering function and uses this rendering function as a property of the Vue instance. The double-speed compilation mode will compile the template into a more optimized rendering function, which can achieve higher rendering performance.

1. Configuring vue-loader

To enable Vue’s double-speed compilation, you first need to configure Vue Loader. Open the webpack configuration file, find the configuration item of Vue Loader, and modify it to the following content:

{
    test: /.vue$/,
    loader: 'vue-loader',
    options: {
        compilerOptions: {
            preserveWhitespace: false
        },
        optimizeSSR: false,
        shouldPreload: (file, type) => {
            return ['js', 'css', 'scss'].includes(type);
        },
        use: [
            'vue-style-loader'
        ]
    }
}

Among them, you need to set compilerOptions.preserveWhitespace to false, which means to remove spaces and newlines in HTML, thereby reducing HTML volume of. At the same time, you also need to set optimizeSSR to false, which means turning off server-side rendering. Finally, the use of Vue Loader is set to vue-style-loader, which means using the style loader provided by Vue.

2. Writing code

During the development process, you need to pay attention to some tips for writing Vue templates to achieve better performance:

1) Avoid Using v-if and v-for directives at the same time can cause performance issues.

2) Use v-show instead of v-if, because v-show only controls the display attribute of the element, and does not add and remove element nodes like v-if.

3) Use the v-once directive to set an element and its sub-elements to be rendered only once to help reduce rendering time.

4) Use computed properties and watchers to obtain and update data. Avoid using complex expressions in templates.

5) For subcomponents that will be used multiple times, use v-once or key attributes to avoid repeated rendering.

The above techniques can effectively reduce page rendering time and improve page performance.

3. Turn on compression in the production environment

In order to further improve the page rendering speed, we should turn on compression in the production environment. By using the Uglifyjs-webpack-plugin plug-in for compression, the file size can be reduced, thereby improving the loading speed of web pages.

4. Other aspects of performance optimization

In addition to the methods mentioned above, there are some other performance optimization methods:

1) Use CDN Acceleration, storing the static resources of web pages (such as JS and CSS files) on the CDN server can reduce the load on the server and speed up file loading.

2) Using server-side caching to cache page data on the server side can reduce the number of database accesses and increase page access speed.

3) Use Web Workers to hand over computing-intensive tasks to Web Workers to avoid blocking the UI thread, thus improving front-end performance.

4) Pay attention to reducing the number of HTTP requests, merging multiple small files into one large file, reducing the number of HTTP requests, and improving page loading speed.

Summary

If you don’t know much about Vue’s double-speed compilation, you may lose the opportunity to improve application performance. Using these optimization techniques, you can avoid performance issues in your code and improve the user experience of your web application. While these optimization methods may take more time and effort, the results you receive will be worth it.

The above is the detailed content of How to adjust vue double speed. For more information, please follow other related articles on the PHP Chinese website!