Tools & Wizards About Us
docbook.org screenshot

Report Summary

  • 95

    Performance

    Renders faster than
    93% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

docbook.org

DocBook.org

Page Load Speed

1.1 sec in total

First Response

124 ms

Resources Loaded

573 ms

Page Rendered

418 ms

docbook.org screenshot

About Website

Click here to check amazing Doc Book content for United States. Otherwise, check out these important facts you probably never knew about docbook.org

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Key Findings

We analyzed Docbook.org page load time and found that the first response time was 124 ms and then it took 991 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

docbook.org performance score

95

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.1 s

81/100

10%

LCP (Largest Contentful Paint)

Value2.1 s

96/100

25%

SI (Speed Index)

Value2.1 s

99/100

10%

TBT (Total Blocking Time)

Value110 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.039

100/100

15%

TTI (Time to Interactive)

Value3.4 s

93/100

10%

Network Requests Diagram

docbook.org

124 ms

tabs.css

39 ms

website.css

77 ms

dbmodnizr.js

27 ms

db-noprism.css

25 ms

Our browser made a total of 18 requests to load all elements on the main page. We found that 61% of them (11 requests) were addressed to the original Docbook.org, 11% (2 requests) were made to Docbook.github.com and 11% (2 requests) were made to Google.com. The less responsive or slowest element that took the longest time to load (198 ms) relates to the external source Cse.google.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 13.5 kB (27%)

Content Size

50.3 kB

After Optimization

36.8 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Docbook.org main page is 50.3 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. Only 10% of websites need less resources to load. Images take 33.5 kB which makes up the majority of the site volume.

HTML Optimization

-68%

Potential reduce by 8.1 kB

  • Original 11.8 kB
  • After minification 11.3 kB
  • After compression 3.7 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 8.1 kB or 68% of the original size.

Image Optimization

-5%

Potential reduce by 1.6 kB

  • Original 33.5 kB
  • After minification 32.0 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. Doc Book images are well optimized though.

CSS Optimization

-77%

Potential reduce by 3.9 kB

  • Original 5.0 kB
  • After minification 2.9 kB
  • After compression 1.1 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. Docbook.org needs all CSS files to be minified and compressed as it can save up to 3.9 kB or 77% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

14

After Optimization

14

  • Images
  • JavaScript
  • CSS

The browser has sent 14 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Doc Book. According to our analytics all requests are already optimized.

Network Requests Diagram

docbook.org

docbook.org

124 ms

tabs.css

tabs.css

39 ms

website.css

website.css

77 ms

dbmodnizr.js

dbmodnizr.js

27 ms

db-noprism.css

db-noprism.css

25 ms

brand

brand

171 ms

db-noprism.css

db-noprism.css

34 ms

dbmodnizr.js

dbmodnizr.js

24 ms

banner.png

banner.png

39 ms

tr_999.gif

tr_999.gif

44 ms

tl_999.gif

tl_999.gif

171 ms

smallcover.gif

smallcover.gif

174 ms

xslcover.png

xslcover.png

170 ms

button.jpg

button.jpg

173 ms

feed-icon.gif

feed-icon.gif

170 ms

rackspaces_logo.png

rackspaces_logo.png

170 ms

brand

brand

198 ms

google_custom_search_watermark.gif

google_custom_search_watermark.gif

75 ms

Accessibility Review

docbook.org accessibility score

92

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

docbook.org best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

docbook.org SEO score

69

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Docbook.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Docbook.org 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

docbook.org

Open Graph description is not detected on the main page of Doc Book. 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: