How to improve website speed? A complete guide to practical optimization methods

in the increasingly fierce traffic competition, website speed has become one of the core factors affecting user retention and search engine ranking. According to data, more than 70% of users will give up websites that take more than 3 seconds to load, and search engines also include website speed in the core ranking indicators. This article will dismantle the website speed improvement plan that can be directly landed from the perspectives of resource optimization, server configuration, code adjustment, etc., to help you get rid of the slow loading dilemma.

, resource compression how to speed up the website?

website needs to transfer a large number of static resources when loading, the volume of these resources directly determines the basic performance of website speed, resource compression is the first step to reduce the transmission volume.

1, image resources lossless compression

pictures are often the largest resource type in the website, accounting for more than 60%. JPG and PNG format pictures can be lossless compressed by TinyPNG, Compressor and other tools, and the compression rate can reach up to 80% without affecting the visual effect; at the same time, WebP, AVIF and other modern picture formats are preferred. Under the same image quality, the volume is about 50% smaller than the traditional format, which greatly shortens the picture loading time and improves the speed of the website.

2, code file compact compression

HTML, CSS, JS and other code files have a lot of spaces, comments and redundant code, which can be compressed with the help of compression tools such as Gzip and Brotli, and the compression rate can reach more than 70%. In addition, CSS and JS files can be merged to reduce the number of HTTP requests, further reduce transmission time, and optimize website speed.

Second, how to optimize the server configuration website speed?

server is the hardware basis for the website to run. Reasonable server configuration can improve the speed of the website from the bottom and avoid the loading delay caused by hardware bottlenecks.

1, select the nearest server node

if the target user is concentrated in a specific area, the server node in the area should be selected to reduce the physical distance of data transmission. For example, for domestic users, the domestic mainstream Cloud as a Service provider's mainland node is preferred, rather than overseas nodes, which can reduce the data transmission delay from hundreds of milliseconds to tens of milliseconds and significantly improve the speed of the website.

2, configure the CDN information delivery network

CDN will cache the static resources of the website to multiple nodes around the world, and the user will automatically select the nearest node to obtain the resources when visiting, without reading from the source server. After configuring the CDN, the loading speed of static resources can be increased by 3-5 times, and at the same time, it can relieve the bandwidth pressure of the source server and ensure the stability of the website speed in high traffic scenarios.

How to ensure the speed of the website?

in addition to code compression, the execution logic and loading order of the code will also affect the speed of the website, and reasonable code optimization can reduce the parsing time of the browser.

1, optimize the code loading order

the browser loads the code will be parsed in sequence, and the loading and execution of the JS file will block the page rendering. Non-essential JS files can be set to asynchronous loading or lazy loading, so that the browser can give priority to the core content of the page; at the same time, the CSS file is placed in the HTML header to ensure that the page style can be loaded in time, avoid the flickering of unstyled content, and optimize the speed of the website from the rendering logic level.

2, remove redundant code and plug-in

many websites will install a large number of functional plug-ins, these plug-ins often carry redundant code, which will not only increase the file size, but also occupy server resources. Regularly clean up unused plug-ins and redundant code, such as deleting unused CSS styles and duplicate JavaScript functions, can reduce the browser's parsing time and server computing pressure, and indirectly improve the speed of the website.

4, cache settings how to stabilize the site speed?

cache allows users to repeatedly access without reloading all resources, directly from the local or node read cache content, is a key means to stabilize the speed of the website.

1, configure browser cache policy

by setting the HTTP response header in the server, set a reasonable cache expiration time for static resources, such as pictures, CSS, JS and other resources can be set for 30 days or even longer cache period, after the first visit, the user will directly access the local cache to read resources, no need to re-download, greatly shorten the loading time, stable website speed.

2 Enable server caching mechanism

for dynamically generated pages, server caching tools such as Redis and Memcached can be enabled to cache the page rendering results into memory, and the cached content can be returned directly when the user visits, so as to avoid the server from repeatedly executing database queries and page rendering operations, reduce the server response time, and ensure the stability of website speed in high concurrency scenarios.

To sum up, website speed optimization is a multi-dimensional collaborative process, which needs to start from four core directions: resource compression, server configuration, code optimization, and cache setting. Through the compression and streamlining of pictures and codes, the configuration of the nearest server and CDN, the adjustment of the loading logic, and the setting of the cache strategy, the website loading time can be shortened in an all-round way, which not only improves the user browsing experience, but also strengthens the ranking competitiveness of the website in the search engine, laying a solid foundation for the long-term operation of the website.