4.1 sec in total
132 ms
3 sec
943 ms
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Visit 123tailieu.comWe analyzed 123tailieu.com page load time and found that the first response time was 132 ms and then it took 4 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
123tailieu.com performance score
name
value
score
weighting
Value4.1 s
21/100
10%
Value4.9 s
29/100
25%
Value4.1 s
79/100
10%
Value410 ms
67/100
30%
Value0.078
95/100
15%
Value6.6 s
57/100
10%
132 ms
369 ms
138 ms
133 ms
193 ms
Our browser made a total of 126 requests to load all elements on the main page. We found that 17% of them (21 requests) were addressed to the original 123tailieu.com, 67% (84 requests) were made to Viewer11.123tailieu.com and 3% (4 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (2.5 sec) belongs to the original domain 123tailieu.com.
Page size can be reduced by 1.8 MB (14%)
12.9 MB
11.1 MB
In fact, the total size of 123tailieu.com main page is 12.9 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 85% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 11.2 MB which makes up the majority of the site volume.
Potential reduce by 183.0 kB
HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 61.3 kB, which is 30% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 183.0 kB or 90% of the original size.
Potential reduce by 492.4 kB
Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. 123 Tailieu images are well optimized though.
Potential reduce by 599.6 kB
It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 599.6 kB or 68% of the original size.
Potential reduce by 511.0 kB
CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. 123tailieu.com needs all CSS files to be minified and compressed as it can save up to 511.0 kB or 84% of the original size.
Number of requests can be reduced by 19 (16%)
118
99
The browser has sent 118 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 123 Tailieu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.
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123tailieu.com accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
Links do not have a discernible name
123tailieu.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
123tailieu.com SEO score
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).
Impact
Issue
Document uses legible font sizes
JA
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 123tailieu.com can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and it does not match the claimed English language. Our system also found out that 123tailieu.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
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123tailieu.com
Open Graph data is detected on the main page of 123 Tailieu. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: