Tools & Wizards About Us
viettelstudy.vn screenshot

Report Summary

  • 23

    Performance

    Renders faster than
    42% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 48% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

viettelstudy.vn

ViettelStudy - mạng xã hội học tập

Page Load Speed

12 sec in total

First Response

1.1 sec

Resources Loaded

10.5 sec

Page Rendered

335 ms

viettelstudy.vn screenshot

About Website

Click here to check amazing Viettel Study content for Vietnam. Otherwise, check out these important facts you probably never knew about viettelstudy.vn

Tất cả các bài giảng, đề thi mới nhất được cập nhật liên tục trên ViettelStudy.vn, mạng xã hội giáo dục trực tuyến dành cho người Việt

Visit viettelstudy.vn

Key Findings

We analyzed Viettelstudy.vn page load time and found that the first response time was 1.1 sec and then it took 10.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

viettelstudy.vn performance score

23

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.0 s

9/100

10%

LCP (Largest Contentful Paint)

Value11.5 s

0/100

25%

SI (Speed Index)

Value12.8 s

2/100

10%

TBT (Total Blocking Time)

Value730 ms

41/100

30%

CLS (Cumulative Layout Shift)

Value0.255

48/100

15%

TTI (Time to Interactive)

Value10.6 s

23/100

10%

Network Requests Diagram

viettelstudy.vn

1089 ms

index.html

1314 ms

support_face.css

500 ms

home.css

751 ms

common.css

756 ms

Our browser made a total of 113 requests to load all elements on the main page. We found that 38% of them (43 requests) were addressed to the original Viettelstudy.vn, 27% (30 requests) were made to Media.viettelstudy.vn and 24% (27 requests) were made to Static.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (7.8 sec) relates to the external source Media.viettelstudy.vn.

Page Optimization Overview & Recommendations

Page size can be reduced by 530.3 kB (30%)

Content Size

1.8 MB

After Optimization

1.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Viettelstudy.vn main page is 1.8 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. 65% of websites need less resources to load. Images take 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 143.5 kB

  • Original 179.9 kB
  • After minification 130.9 kB
  • After compression 36.4 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 49.0 kB, which is 27% 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 143.5 kB or 80% of the original size.

Image Optimization

-12%

Potential reduce by 146.3 kB

  • Original 1.2 MB
  • After minification 1.1 MB

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. Obviously, Viettel Study needs image optimization as it can save up to 146.3 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-64%

Potential reduce by 204.6 kB

  • Original 318.6 kB
  • After minification 305.1 kB
  • After compression 113.9 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 204.6 kB or 64% of the original size.

CSS Optimization

-81%

Potential reduce by 35.9 kB

  • Original 44.4 kB
  • After minification 41.0 kB
  • After compression 8.5 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. Viettelstudy.vn needs all CSS files to be minified and compressed as it can save up to 35.9 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 55 (50%)

Requests Now

109

After Optimization

54

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 109 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Viettel Study. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 31 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

viettelstudy.vn

viettelstudy.vn

1089 ms

index.html

index.html

1314 ms

support_face.css

support_face.css

500 ms

home.css

home.css

751 ms

common.css

common.css

756 ms

jquery.min.js

jquery.min.js

1254 ms

jquery.bxSlider.min.js

jquery.bxSlider.min.js

757 ms

overlay2.js

overlay2.js

748 ms

home.js

home.js

998 ms

WebResource.axd

WebResource.axd

255 ms

ScriptResource.axd

ScriptResource.axd

760 ms

ScriptResource.axd

ScriptResource.axd

524 ms

search.js

search.js

496 ms

conversion.js

conversion.js

14 ms

ga.aspx

ga.aspx

950 ms

thumb11_949764370.png

thumb11_949764370.png

1833 ms

close-lb.gif

close-lb.gif

32 ms

capchaImage.aspx

capchaImage.aspx

283 ms

ajax-loader.gif

ajax-loader.gif

261 ms

gototop.png

gototop.png

262 ms

logo_tiin.png

logo_tiin.png

263 ms

logo_keeng_footer.png

logo_keeng_footer.png

263 ms

logo_songkhoe.png

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541 ms

logo_tinngan.png

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540 ms

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540 ms

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541 ms

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2557 ms

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1320 ms

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1326 ms

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1881 ms

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1625 ms

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1363 ms

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2068 ms

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2579 ms

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4223 ms

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2145 ms

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3955 ms

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4061 ms

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4227 ms

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4293 ms

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3582 ms

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4585 ms

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5510 ms

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5806 ms

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5782 ms

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5007 ms

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5285 ms

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6088 ms

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6309 ms

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7769 ms

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6806 ms

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7341 ms

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7800 ms

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7843 ms

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7609 ms

img_new_19.png

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297 ms

img_new_02.png

img_new_02.png

295 ms

img_new_06.png

img_new_06.png

692 ms

img_new_08.png

img_new_08.png

690 ms

logo_gd.png

logo_gd.png

691 ms

btn_search.png

btn_search.png

692 ms

menu_home.png

menu_home.png

679 ms

img_new_11.png

img_new_11.png

680 ms

ga.js

ga.js

22 ms

123 ms

fbevents.js

fbevents.js

126 ms

gd_50.png

gd_50.png

732 ms

icon_news_01.png

icon_news_01.png

733 ms

tn_web_21.png

tn_web_21.png

734 ms

icon_new_02.png

icon_new_02.png

734 ms

__utm.gif

__utm.gif

29 ms

img_new_14.png

img_new_14.png

652 ms

img_new_13.png

img_new_13.png

653 ms

icon_view_more.png

icon_view_more.png

900 ms

comments.php

comments.php

156 ms

gd_11.png

gd_11.png

879 ms

160201-01.png

160201-01.png

890 ms

143 ms

collect

collect

153 ms

logo_gd_footer.png

logo_gd_footer.png

872 ms

logo_viettel.png

logo_viettel.png

872 ms

catefish_02.png

catefish_02.png

858 ms

116 ms

like.php

like.php

147 ms

gd_07.png

gd_07.png

1014 ms

jTuqQ-OPDr6.css

jTuqQ-OPDr6.css

90 ms

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113 ms

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119 ms

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131 ms

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142 ms

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164 ms

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125 ms

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187 ms

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161 ms

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175 ms

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175 ms

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161 ms

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181 ms

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178 ms

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178 ms

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179 ms

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180 ms

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237 ms

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225 ms

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215 ms

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151 ms

fav.png

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24 ms

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75 ms

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73 ms

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22 ms

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21 ms

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18 ms

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27 ms

Accessibility Review

viettelstudy.vn accessibility score

79

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

viettelstudy.vn best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

viettelstudy.vn SEO score

83

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    VI

  • Language Claimed

    VI

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Viettelstudy.vn can be misinterpreted by Google and other search engines. Our service has detected that Vietnamese is used on the page, and it matches the claimed language. Our system also found out that Viettelstudy.vn 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.

Social Sharing Optimization

viettelstudy.vn

Open Graph data is detected on the main page of Viettel Study. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: