How to conduct a professional website opening speed test?

at the moment of increasingly fierce traffic competition, website opening speed directly affects user retention, conversion rate and even search engine ranking. More and more webmasters realize the importance of professional performance testing. But many people still stay at the subjective test level of simple click access, and it is difficult to accurately locate performance bottlenecks. This article will share the complete process of professional website opening speed testing from multiple levels such as tool selection, test dimension, data interpretation, etc., to help you get rid of the misunderstanding of blind testing, and use scientific methods to control website performance.

, how to choose the website open speed test tool?

professional test results are inseparable from reliable tool support. The testing principles and coverage scenarios of different tools are different, and they need to be selected according to the testing needs.

1, overseas professional tools

overseas tool represented by GTmetrix and PageSpeed Insights, it is a highly recognized website opening speed test tool in the industry. GTmetrix can provide detailed data such as waterfall loading diagram and page weight analysis, and can also give personalized optimization suggestions; PageSpeed Insights is developed by Google, which better fits the performance standards of search engine rankings, and supports separate testing of mobile end and desktop end, suitable for webmasters who need to optimize SEO.

2, domestic localization tools

considering the particularity of the domestic network environment, webmasters can also choose webmaster tools, Alibaba Cloud speed measurement and other localized websites to open speed testing tools. The test nodes of such tools cover domestic operators in multiple provinces and cities, which can more accurately reflect the actual access speed of domestic users. Some tools also support simultaneous testing in multiple regions, which is convenient for quick troubleshooting of cross-operator access differences.

2. What dimensions does the website opening speed test need to cover?

single-dimensional test results have limitations, only by covering multi-scene and multi-dimensional tests can we fully grasp the real performance of the website.

1, multi-end point scenario test

mobile Internet era, the proportion of mobile end users continues to increase, and the website opening speed test must cover both the desktop end and the mobile end. The network environment of the mobile end is more complex, and the loading speed of different networks such as 4G, 5G, and Wi-Fi is obviously different. During the test, it is necessary to simulate different network environments and view the loading performance of the page in the weak connection environment to avoid lapsed users due to insufficient mobile end performance.

2, multi-regional node test

network lines and server distances in different regions will affect the access speed, so the website opening speed test needs to cover multiple regional nodes. For example, for websites facing users across the country, you can choose test nodes in core regions such as North China, East China, and South China to view the load time differences in different regions. If the speed of a certain region is obviously low, you can consider optimizing through CDN acceleration, node deployment, etc.

3, first and repeat visit testing

the browser has no cache when visiting for the first time, the local cache will be called for repeated visits. The test results of the website opening speed in the two scenarios are quite different. During the test, the loading time of the two scenarios needs to be recorded separately. The speed of the first visit reflects the basic performance of the website, and the speed of repeated visits reflects the rationality of the cache strategy, which is convenient for optimizing the cache configuration to improve the access experience of return customer.

How to interpret the website opening speed test data?

get the test data, can not only look at the surface of the loading time numbers, need to deeply interpret the meaning behind the indicators, in order to accurately locate the performance bottleneck.

1, core performance indicators interpretation

website opening speed test report, the first screen loading time, maximum content drawing LCP, first input delay FID are the core indicators. The first screen loading time directly affects the user's first impression, and it is recommended to control it within 3 seconds; LCP is a key indicator to measure the loading speed of the main content of the page, and search engines include it in the ranking reference dimension; FID reflects the interaction response speed of the page. The lower the value, the smoother the page interaction.

2, waterfall flow chart analysis

most professional website opening speed test tools will provide a waterfall loading diagram, through which you can intuitively see the loading sequence, time consumption and request status of each resource. If a resource takes too long to load or the request is blocked, it means that the resource may be a performance bottleneck, which can be optimized by resource compression, lazy loading, CDN acceleration, etc.

4. How to verify the optimization effect after the website opening speed test?

the completion of performance optimization, can not directly default to the problem has been solved, need to verify the optimization effect through retest, to ensure that the performance of the website has been substantially improved.

1, the same conditions repeated test

retest needs to maintain the same tools, nodes and end point environment as the first website opening speed test to avoid data distortion due to changes in test conditions. For example, when testing mobile end with GTmetrix's Hong Kong node for the first time, the same configuration needs to be selected during retest, so that the loading time and performance score changes can truly reflect the effect of optimization measures.

2, long-term performance monitoring

website performance will fluctuate with content updates and server load changes, and the results of a single website opening speed test can only reflect the current state. Webmasters can use tool settings to monitor regularly, such as a weekly full-dimensional test to record the changing trend of performance indicators. If the indicators decline, check whether it is performance problems caused by new content, plug-in updates and other factors in time.

To sum up, the professional website opening speed test is a complete process from tool selection, multi-dimensional testing to data interpretation and optimization verification, not a simple single click detection. By choosing the right test tool, covering the test dimensions of multiple end points and multiple regions, accurately interpreting the core performance indicators, combined with re-testing to verify the optimization effect, the webmaster can scientifically control the performance of the website, solve the performance bottleneck in a targeted manner, and ultimately improve the user experience and search engine ranking competitiveness.