Let’s talk about mini program performance optimization set by uniapp

With the popularity of small programs, more and more developers are beginning to use uniapp to develop small programs. Although uniapp is praised for its characteristics of "once development, multi-terminal operation", during development, it is still necessary to pay attention to the optimization of mini program performance.

This article will introduce uniapp's performance optimization methods when setting up small programs, including image optimization, code compression, component streamlining, request merging, etc.

1. Image optimization

1. Image size: When using images, you should set the appropriate image size according to your needs to minimize image file size and load time.
2. Image format: The most commonly used image formats in mini programs are jpg, png, and webp. When choosing an image format, you should choose an appropriate format based on the image content and quality requirements. Generally speaking, png format files are larger than jpg format files, but they restore image details better. The webp format is a new format suitable for transmission on the network. Its file size can be 40-50% smaller than the jpeg format, and the quality can maintain the original level.
3. Lazy loading of images: Lazy loading of images is a common optimization method that can reduce page rendering time. In uniapp, you can use the lazyload component to implement lazy loading of images.

2. Code compression

1. JS code compression: By compressing JS code, you can reduce the size of the code file, shorten the download time, and improve the page response speed. In uniapp, you can use webpack's UglifyJsPlugin plug-in to compress JS code
2. CSS code compression: Compressing CSS code can also reduce the size of CSS files and speed up web page rendering. In uniapp, you can use the cssnano plug-in to compress CSS code.

3. Component simplification

1. Reducing component references: During the component reference process, you should try to avoid referencing useless components. Because component references will increase the mini program's package size, this will cause the mini program to take longer to load. In uniapp, you can use the tree shaking feature to reduce component references.
2. Component caching: In mini programs, components are sometimes reused. At this time, you can add cache to avoid repeated creation of components, thereby improving mini program performance. In uniapp, you can use cache to cache components.

4. Request merging

1. Data request merging: Each time the mini program sends a request, a certain network overhead will be incurred. Therefore, for data that needs frequent access, multiple requests can be merged. Requests are integrated into one request, reducing network overhead and improving mini program performance.
2. Static resource merging: The number of static resource requests in the mini program will also affect the performance of the mini program. Therefore, the static resources can be merged into one file and the data can be obtained asynchronously and concurrently through the arrival time slice. In uniapp, asynchronous loading of static files can be achieved by using web workers.

Summary:

The above are several aspects of performance optimization of uniapp settings mini program, which can be started from image optimization, code compression, component streamlining, request merging, etc. Through these optimization methods, the response speed of the mini program is faster and the loading time is shorter, which improves the user experience and facilitates the promotion and dissemination of the mini program.

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