Tools & Wizards About Us

Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 72

    Accessibility

    Visual factors better than
    that of 37% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

vdoc.com.vn

Quảng cáo trực tuyến TaiLieu.VN, SEO Website, Thiết kế và xây dựng Website, E-Marketing, giải pháp mạng, phần mềm... – VDOC

Page Load Speed

5.2 sec in total

First Response

772 ms

Resources Loaded

4.3 sec

Page Rendered

106 ms

About Website

Click here to check amazing VDOC content for Vietnam. Otherwise, check out these important facts you probably never knew about vdoc.com.vn

VDOC nhà cung cấp thư viện chia sẻ tài liệu trực tuyến TaiLieu.VN, cung cấp các dịch vụ như: Quảng cáo trực tuyến, SEO tối ưu hóa tìm kiếm, thiết kế và xây dựng Website, Online Marketing, tư vấn và cu...

Visit vdoc.com.vn

Key Findings

We analyzed Vdoc.com.vn page load time and found that the first response time was 772 ms and then it took 4.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

vdoc.com.vn performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.5 s

6/100

10%

LCP (Largest Contentful Paint)

Value5.7 s

16/100

25%

SI (Speed Index)

Value11.1 s

6/100

10%

TBT (Total Blocking Time)

Value1,730 ms

10/100

30%

CLS (Cumulative Layout Shift)

Value0.132

81/100

15%

TTI (Time to Interactive)

Value16.1 s

6/100

10%

Network Requests Diagram

vdoc.com.vn

772 ms

vdoc.com.vn

1061 ms

css

46 ms

css

65 ms

bootstrap.min.css

40 ms

Our browser made a total of 50 requests to load all elements on the main page. We found that 48% of them (24 requests) were addressed to the original Vdoc.com.vn, 20% (10 requests) were made to Fonts.gstatic.com and 10% (5 requests) were made to Youtube.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Vdoc.com.vn.

Page Optimization Overview & Recommendations

Page size can be reduced by 40.1 kB (6%)

Content Size

670.4 kB

After Optimization

630.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vdoc.com.vn main page is 670.4 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 80% 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. Javascripts take 444.6 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 28.7 kB

  • Original 35.6 kB
  • After minification 32.7 kB
  • After compression 6.9 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 28.7 kB or 81% of the original size.

Image Optimization

-7%

Potential reduce by 8.7 kB

  • Original 127.7 kB
  • After minification 119.0 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. VDOC images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 2.5 kB

  • Original 444.6 kB
  • After minification 444.6 kB
  • After compression 442.1 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

-0%

Potential reduce by 198 B

  • Original 62.6 kB
  • After minification 62.6 kB
  • After compression 62.4 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. Vdoc.com.vn has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 14 (37%)

Requests Now

38

After Optimization

24

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 38 CSS, Javascripts, AJAX and image requests in order to completely render the main page of VDOC. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

vdoc.com.vn accessibility score

72

Accessibility Issues

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

Image elements do not have [alt] attributes

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.

Best Practices

vdoc.com.vn best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

vdoc.com.vn SEO score

92

Search Engine Optimization Advices

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

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 Vdoc.com.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 Vdoc.com.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 VDOC. 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: