TBT is a measure in the core web vital (the vital core of the web) that was launched by Google to measure and evaluate the user and audience experience on a web page. Information related to this section is available in Google search console and site speed measurement tools. This is an important factor in determining the ranking in Google’s page speed insight and is very effective in the SEO of the site. This criterion plays an effective role in the ranking of Google pages and helps us create a better experience for users. Years after its introduction, this criterion has received more attention, especially from SEO experts. What is its exact definition and how it is measured requires more detailed explanations, which we have discussed in detail in this article from Rayapars. Stay with us to review the applications of this concept and learn about solutions to improve its rate.
What is TBT or Total Blocking Time?
Before defining TBT, it is not bad to briefly introduce two other terms to better understand the main concept.
FCP (First Contentful Paint): loading the first page element of the site
TTI (Time To Interactive): The time it takes for a page to be interactive for the user.
Now we can better define that TBT or Total Blocked Time is the total time between FCP and TTI. That is, when the main thread (Main Thread) of the site page is so blocked that the user is not allowed to interact with the page. The main thread is a part of the browser that executes various resources such as HTML, CSS, JAVA SCRIPT files, etc. and loads the page. In fact, the browser uses the main thread when loading the page and interacting with the user and clicking. But blocking occurs when page elements and other main thread tasks take more than 50 milliseconds to load. When the main thread is blocked and the browser cannot interfere with what the main thread is doing.
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The user is waiting and wants to interact with the desired page; But the browser cannot provide an answer to the user’s request and the user must wait until the blocking of the main thread ends and perform its task properly. But if the blocking time of the page takes more than a certain amount of time, the user will be frustrated and may think that the page is frozen and opening is slow; This may leave the audience and go to another site. TBT time is calculated after this 50 seconds. That is, if doing a task for the main thread takes more than this amount of time, it is considered as a long task. For example, if it takes 75 milliseconds to perform a task such as opening a JavaScript file, it means that 25 seconds of blocking time have passed until the loading is complete.
What is the best amount of TBT?
There is a standard TBT rate that has been determine by researching thousands of sites that have the best TBT rate. According to google lighthouse definitions, this amount is optimal and ideal for site with TBT less than 300 milliseconds. If our site is well optimize in terms of SEO technical principle, this amount should be the same amount. This value is calculate according to all the long tasks that are execute on the site. In general, Total Blocking Time factor rate are rate in the following range:
– Between 0 and 300 milliseconds
In this case, the situation of our site is very good and we do not need to take any special action to reduce the page blocking rate.
– Between 300 and 600 milliseconds
This is a kind of intermediate for the amount of blocking, but it is better to put programs to fix and improve it.
– More than 600 milliseconds
These pages are classified as slow pages that open slowly and with a delay. In these cases, it is necessary to optimize the TBT rate as soon as possible.
TBT measurement tools
There are various and efficient tools and methods to measure TBT. But Google’s own tools are more recommended due to the fact that it is the introducer of these factors and the main developer of site SEO principles. Tools such as Google Lighthouse and Google Page Speed Simulators are among the simple tools introduce by Google itself, and GTMetrix is one of the other widely used and very accurate tools for measuring site blocking rate. Other acceptable tools for measuring TBT are as follows:
– Chrome Dev Tools
– Speed Curve
– Pingdom
– Web Page Test
What effect does TBT have on SEO?
When the elements of a page take a long time to open, the user thinks part of his time is waste and may not wait long for our page to open. Because it is very important for him that after entering a page, he can quickly access its various services and create the desired interaction. But the excessive blocking of the main thread and the unresponsiveness of the browser eventually tire the user and leave our site easily. This is one of the things that greatly lowers the user experience of a site in the first encounter with its users. On the other hand, Google considers TBT as one of the important factors of Core Vital Web in improving the user experience, and in addition, it has assigned some other algorithms to check the satisfaction of users.
Like other factors affecting the speed, this matter is important in the ranking of the site, and Google gives it a special score, which all affects the optimization of the site or SEO. High TBT has a direct relationship with bounce rate. That is, the higher the blocking rate and the opening speed of the elements of a page, it can increase the intensity of the site’s bounce rate, which is consider a destructive action for the SEO of the site.
The more we can reduce the amount of Total Blocking Time with the introduced tools, the more special points we will receive from Google and the more successful we will appear in our site’s SEO. You may not be able to optimize this factor and other effective factors in improving website speed by yourself, in this case you can ask an SEO consultant to analyze your website and provide solutions to improve it.
Strategies to optimize TBT
There are various solutions to reduce the blocking rate and TBT of our site. Knowing the latest techniques to increase the speed of the site helps us to prevent the upcoming problems that we talked about in the previous section and to keep our Total Blocking Time rate optimal. A solution such as third party management and reducing the time of JavaScript execution are among the effective solutions in carrying out these actions, the description of which and the rest of the methods are as follows:
1 Reduce third-party scripts
There are many use of this type how can you use influencers for referral marketing? of script, which can be mention: sharing the content and page on social networks. Getting statistics from the page, inserting a video player and other use. These types of scripts significantly increase requests to the server and sometimes contain suboptimal content that interferes with page performance. To control the amount of TBT, it is better to limit these scripts as much as possible.
2 Simplify the Main Thread
Since many browser tasks are perform in the main thread. It is better not to create an unnecessary task for it as much as possible. You can take advantage of the following actions to silence the Main Thread:
– Reduce the size of CSS
– Using web workers
– Removing codes that are not useful
– Reducing script evaluation time
3. Reduce the execution time of JavaScript codes
JavaScript execution time is related agb directory to several factors such as memory, network and execution costs. Things like unused scripts, coding errors, and unoptimized code also. Cause JavaScript to take time to run and consume a lot of time. Also, compiling, parsing and executing unusable script files has. A significant impact on the execution time of these codes and the final page loading time. For this purpose, instead of using these code in general. It is recommend to divide them into several parts and reduce the size of the code.
conclusion
In this article from Raya Pars, we explained that TBT, like other factors and factors affecting. The speed of page opening, has been important and special in Google search page ranking (SERP) and. Google uses criteria such as core web vital to improve the experience. Web users benefit. There are also tools such as Google Lighthouse to measure TBT or page blocking time. Script, we can optimize this value and bring it closer to a lower number. You can always raise your other questions with our experts in Rayapars through the contact us section.
