Tools & Wizards About Us
vdoc.pub screenshot

Report Summary

  • 38

    Performance

    Renders faster than
    57% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

vdoc.pub

E-book library. Search and download for free, instantly.

Page Load Speed

6 sec in total

First Response

249 ms

Resources Loaded

5.1 sec

Page Rendered

697 ms

vdoc.pub screenshot

About Website

Welcome to vdoc.pub homepage info - get ready to check Vdoc best content for United States right away, or after learning these important things about vdoc.pub

Our website have hundred thousands of free e-books and documents for students. All are free and downloadable.

Visit vdoc.pub

Key Findings

We analyzed Vdoc.pub page load time and found that the first response time was 249 ms and then it took 5.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

vdoc.pub performance score

38

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

46/100

10%

LCP (Largest Contentful Paint)

Value5.7 s

16/100

25%

SI (Speed Index)

Value5.7 s

51/100

10%

TBT (Total Blocking Time)

Value510 ms

57/100

30%

CLS (Cumulative Layout Shift)

Value0.886

3/100

15%

TTI (Time to Interactive)

Value5.7 s

68/100

10%

Network Requests Diagram

vdoc.pub

249 ms

vdoc.pub

664 ms

bootstrap.min.css

535 ms

menu.css

597 ms

style.css

875 ms

Our browser made a total of 61 requests to load all elements on the main page. We found that 89% of them (54 requests) were addressed to the original Vdoc.pub, 8% (5 requests) were made to Fonts.gstatic.com and 2% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.9 sec) belongs to the original domain Vdoc.pub.

Page Optimization Overview & Recommendations

Page size can be reduced by 79.8 kB (6%)

Content Size

1.3 MB

After Optimization

1.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vdoc.pub main page is 1.3 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. 35% of websites need less resources to load. Images take 955.4 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 31.1 kB

  • Original 36.7 kB
  • After minification 36.6 kB
  • After compression 5.6 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. 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 31.1 kB or 85% of the original size.

Image Optimization

-3%

Potential reduce by 30.3 kB

  • Original 955.4 kB
  • After minification 925.1 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

-5%

Potential reduce by 7.5 kB

  • Original 152.8 kB
  • After minification 152.8 kB
  • After compression 145.3 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

-9%

Potential reduce by 10.9 kB

  • Original 115.4 kB
  • After minification 115.4 kB
  • After compression 104.5 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. Vdoc.pub has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 28 (55%)

Requests Now

51

After Optimization

23

  • Images
  • JavaScript
  • CSS

The browser has sent 51 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 12 to 1 for JavaScripts and from 18 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

vdoc.pub

vdoc.pub

249 ms

vdoc.pub

vdoc.pub

664 ms

bootstrap.min.css

bootstrap.min.css

535 ms

menu.css

menu.css

597 ms

style.css

style.css

875 ms

responsive.css

responsive.css

623 ms

email-decode.min.js

email-decode.min.js

25 ms

jquery-3.3.1.js

jquery-3.3.1.js

938 ms

jquery-migrate-3.0.0.min.js

jquery-migrate-3.0.0.min.js

703 ms

popper.min.js

popper.min.js

897 ms

bootstrap.min.js

bootstrap.min.js

1091 ms

bootbox.all.min.js

bootbox.all.min.js

971 ms

jquery.mmenu.all.js

jquery.mmenu.all.js

1077 ms

ace-responsive-menu.js

ace-responsive-menu.js

1194 ms

scrollto.js

scrollto.js

1208 ms

jquery-scrolltofixed-min.js

jquery-scrolltofixed-min.js

1303 ms

script.js

script.js

1317 ms

js

js

56 ms

jquery-ui.min.css

jquery-ui.min.css

576 ms

font-awesome.min.css

font-awesome.min.css

574 ms

font-awesome-animation.min.css

font-awesome-animation.min.css

712 ms

ace-responsive-menu.css

ace-responsive-menu.css

679 ms

megadropdown.css

megadropdown.css

756 ms

bootstrap-select.min.css

bootstrap-select.min.css

757 ms

simplebar.min.css

simplebar.min.css

881 ms

progressbar.css

progressbar.css

904 ms

flaticon.css

flaticon.css

986 ms

animate.css

animate.css

1122 ms

slider.css

slider.css

1098 ms

magnific-popup.css

magnific-popup.css

1104 ms

timecounter.css

timecounter.css

1273 ms

css

css

25 ms

close.png

close.png

310 ms

loading.gif

loading.gif

310 ms

prev.png

prev.png

326 ms

next.png

next.png

331 ms

header-logo3.png

header-logo3.png

326 ms

logo-socudoc-square.png

logo-socudoc-square.png

559 ms

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2phbcf10r880.jpg

763 ms

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767 ms

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1301 ms

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652 ms

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820 ms

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921 ms

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1144 ms

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1218 ms

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1231 ms

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1142 ms

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1233 ms

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1637 ms

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1637 ms

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1530 ms

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1686 ms

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XRXI3I6Li01BKofiOc5wtlZ2di8HDLshdTQ3iQ.woff

108 ms

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108 ms

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186 ms

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XRXI3I6Li01BKofiOc5wtlZ2di8HDFwmdTQ3iQ.woff

188 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4gaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4gaVQ.woff

188 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

1682 ms

Flaticon.svg

Flaticon.svg

1578 ms

Flaticon.woff

Flaticon.woff

1940 ms

Accessibility Review

vdoc.pub accessibility score

89

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

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

High

Links do not have a discernible name

Best Practices

vdoc.pub 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

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

vdoc.pub SEO score

92

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

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

vdoc.pub

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: