Tools & Wizards About Us

Report Summary

  • 8

    Performance

    Renders faster than
    22% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 44% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

vdo.vn

VDO - VDO - Cung cấp giải pháp công nghệ máy chủ thiết bị cloud server

Page Load Speed

14.2 sec in total

First Response

564 ms

Resources Loaded

12.6 sec

Page Rendered

1.1 sec

About Website

Visit vdo.vn now to see the best up-to-date VDO content for Vietnam and also check out these interesting facts you probably never knew about vdo.vn

Trang chủ VDO cung cấp các thông tin tổng quan về VDO: Lịch sử hình thành, các sản phẩm, hệ thống phân phối, đối tác chiến lược, khách hàng thân thiết.

Visit vdo.vn

Key Findings

We analyzed Vdo.vn page load time and found that the first response time was 564 ms and then it took 13.7 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

vdo.vn performance score

8

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.9 s

10/100

10%

LCP (Largest Contentful Paint)

Value42.7 s

0/100

25%

SI (Speed Index)

Value10.8 s

6/100

10%

TBT (Total Blocking Time)

Value3,110 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0.349

32/100

15%

TTI (Time to Interactive)

Value16.6 s

5/100

10%

Network Requests Diagram

vdo.vn

564 ms

dis.vdo.com.vn

2213 ms

output.css

958 ms

common.css

716 ms

all.css

393 ms

Our browser made a total of 160 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Vdo.vn, 66% (105 requests) were made to Res.vdo.vn and 17% (27 requests) were made to Dis.vdo.com.vn. The less responsive or slowest element that took the longest time to load (8.3 sec) relates to the external source Res.vdo.vn.

Page Optimization Overview & Recommendations

Page size can be reduced by 5.7 MB (21%)

Content Size

27.9 MB

After Optimization

22.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vdo.vn main page is 27.9 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. Only a small number of websites need less resources to load. Images take 26.6 MB which makes up the majority of the site volume.

HTML Optimization

-96%

Potential reduce by 850.1 kB

  • Original 882.7 kB
  • After minification 625.9 kB
  • After compression 32.6 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 256.7 kB, which is 29% 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 850.1 kB or 96% of the original size.

Image Optimization

-18%

Potential reduce by 4.8 MB

  • Original 26.6 MB
  • After minification 21.8 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, VDO needs image optimization as it can save up to 4.8 MB or 18% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-8%

Potential reduce by 29.9 kB

  • Original 382.1 kB
  • After minification 381.6 kB
  • After compression 352.2 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. This website has mostly compressed JavaScripts.

CSS Optimization

-22%

Potential reduce by 19.6 kB

  • Original 88.8 kB
  • After minification 72.3 kB
  • After compression 69.2 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. Vdo.vn needs all CSS files to be minified and compressed as it can save up to 19.6 kB or 22% of the original size.

Requests Breakdown

Number of requests can be reduced by 39 (26%)

Requests Now

150

After Optimization

111

  • Images
  • JavaScript
  • CSS

The browser has sent 150 CSS, Javascripts, AJAX and image requests in order to completely render the main page of VDO. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 13 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

vdo.vn accessibility score

77

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not have valid values

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

Buttons do not have an accessible name

High

<frame> or <iframe> elements do not have a title

High

Links do not have a discernible name

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

vdo.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

High

Missing source maps for large first-party JavaScript

SEO Factors

vdo.vn SEO score

90

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

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 Vdo.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 Vdo.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

Open Graph description is not detected on the main page of VDO. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: