What is CDN and why do you need to optimize website loading speed?

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What is CDN and why do you need to optimize website loading speed? - What is CDN and why should you use it when there is a way to optimize web performance (WPO) to speed up WordPress? Caching plugins like W3 Total Cache to speed up WordPress download time and speed, so why is content delivery network needed to optimize speed?

There are suggestions that slow loading websites have significantly higher bounce rates than sites with faster speeds. Not that you are losing customers but also your rankings will be affected. Bounce rate is a Google ranking factor.

Nobody likes a slow loading website, so let's discuss the CDN and whether it helps improve, with other factors to speed up WordPress.

What is a CDN?


CDN stands for Content Distribution Network (Or Content Distribution Network), which relates to hosting and static content. Static content such as cached CSS stylesheets, images and other media, flash, JavaScript, etc. That data is called when every page you load.

When someone visits the website, they will download this static content from the central server of the web server. Take HostGator as an example, this will be Houston, Texas. Everyone's static content, whether they are in Houston, China or the UK, will be accessible from Houston. Great if you are Texan, but not good in Korea!

CDN is a network of servers located on the internet. Static content is also stored on the server and for users from the nearest server to the location. Therefore, the bigger the network, the more effective the CDN.

Reduce latency


This system reduces latency, time between host receiving, processing and distributing page resources such as images or CSS files. The more objects on a page, the longer the latency. Each individual object is associated with a different request to the server. Therefore, complex pages will take more time to solve simple pages.

The site does not load faster, essentially, because without the CDN, it will still appear quickly for Houston visitors. The further you live away from the main server, the slower it will appear. Therefore, there may still be a relative delay if the visitor is remote from the nearest server in the CDN.

Latency adds anything from 100ms to 3 seconds at load time, the latter usually related to mobile devices on your site. Considering that it is only a factor that affects download speeds, this is a significant number.

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Optimize CDN and web performance


WPO is used to consolidate transmitted packets, thus minimizing transmission, thus reducing latency. Compression also reduces the size of the package, because it arranges the buffer so that it is loaded with static content in the order they appear on the page and the preloaded pages are expected to be called next. However, none of this reduces the need for CDNs in speed optimization.

Another benefit of a CDN is that it rarely happens. If one server goes down, the information is still stored on another server on the network and is still accessible. It also significantly increases the number of server users, which in itself reduces the possibility of power outages. Although 100% availability is claimed to be attainable, but cannot be guaranteed.

What is the choice of the CDN problem?


To find the best, you will have to find the nearest server. It is the server's proximity to the device.

Bandwidth and internet connection speed are also important. The larger the bandwidth, the higher the capacity of the network so the less congestion is possible. Therefore, the latency will be less affected by the number of users.

The faster the speed, the lower the latency, because it will take less time for the static data needs to reach the server and the data is returned. However, to make a difference to the benefits of CDN - the percentage increase will remain the same. Optimal relative speed is not affected by bandwidth or internet speed.

CDN systems are often more efficient with desktop and mobile devices. The results are not nearly as impressive as with desktops. When the mobile speed increases this absolute advantage in reducing speed will certainly decrease, but again, the relative advantage will be constant because it is a function of the CDN and not the transmission speed or capacity. .

Who needs a content delivery network?


Although the growth rate can be enormous, not everyone needs a CDN. If you live locally with the primary host, you have no need. The more you leave the WordPress hosting service, the more you will benefit from using the CDN.

Also, keep in mind that a content delivery network is designed to address only one speed issue - that is the latency associated with static content. In fact, it also works with some dynamic content, though not its main function. Handling the user interface and third party content is not affected by the CDN and you should incorporate WPO as the W3 cache storage plugin.

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Summary of the benefits of CDN in website speed optimization

The main benefit of using CDN is to bring about a significant increase in download speed. This refers to the time it takes the server to receive requests for static content, retrieve that content, and then send it.

It makes pages load faster and has a lower bounce rate. Therefore, it will retain visitors who click during the load. Because bounce rate is an aspect of ranking, you get a higher ranking than Google without the CDN.

Such a CDN network will be less efficient with mobile computers than desktops and optimize the speed increases when increasing the distance from the nearest server in the network. CDN does not deny the need for other means to increase performance, such as front-end WPO with buffer solutions.