Tools & Wizards About Us

Report Summary

  • 0

    Performance

  • 33

    Accessibility

    Visual factors better than
    that of 18% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 73

    SEO

    Google-friendlier than
    31% of websites

cfdbooks.com

** Useful Books on Computational Fluid Dynamics: I do like CFD. **

Page Load Speed

20.5 sec in total

First Response

40 ms

Resources Loaded

20.3 sec

Page Rendered

87 ms

About Website

Click here to check amazing CFD Books content. Otherwise, check out these important facts you probably never knew about cfdbooks.com

A series of very useful books on Computational Fluid Dynamics: I do like CFD, by Katate Masatsuka, Ph.D.

Visit cfdbooks.com

Key Findings

We analyzed Cfdbooks.com page load time and found that the first response time was 40 ms and then it took 20.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

cfdbooks.com performance score

0

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value0

0/100

10%

LCP (Largest Contentful Paint)

Value0

0/100

25%

SI (Speed Index)

Value0

0/100

10%

TBT (Total Blocking Time)

Value0

0/100

30%

CLS (Cumulative Layout Shift)

Value0.004

100/100

15%

TTI (Time to Interactive)

Value0

0/100

10%

Network Requests Diagram

cfdbooks.com

40 ms

131 ms

siteUtil.js

58 ms

layout3.css

106 ms

theme.css

107 ms

Our browser made a total of 19 requests to load all elements on the main page. We found that 5% of them (1 request) were addressed to the original Cfdbooks.com, 42% (8 requests) were made to Ossanworld.com and 16% (3 requests) were made to J1.ax.xrea.com. The less responsive or slowest element that took the longest time to load (19.9 sec) relates to the external source Wj.ax.xrea.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 9.1 kB (11%)

Content Size

80.6 kB

After Optimization

71.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cfdbooks.com main page is 80.6 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. 15% of websites need less resources to load. Javascripts take 44.6 kB which makes up the majority of the site volume.

HTML Optimization

-42%

Potential reduce by 423 B

  • Original 1.0 kB
  • After minification 979 B
  • After compression 579 B

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 423 B or 42% of the original size.

Image Optimization

-13%

Potential reduce by 4.3 kB

  • Original 33.4 kB
  • After minification 29.1 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. Obviously, CFD Books needs image optimization as it can save up to 4.3 kB or 13% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-9%

Potential reduce by 3.9 kB

  • Original 44.6 kB
  • After minification 44.5 kB
  • After compression 40.7 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

-28%

Potential reduce by 444 B

  • Original 1.6 kB
  • After minification 1.6 kB
  • After compression 1.2 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. Cfdbooks.com needs all CSS files to be minified and compressed as it can save up to 444 B or 28% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

14

After Optimization

14

  • AJAX
  • Images
  • JavaScript
  • CSS

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

Network Requests Diagram

Accessibility Review

cfdbooks.com accessibility score

33

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

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

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

cfdbooks.com 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

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

cfdbooks.com SEO score

73

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 Cfdbooks.com 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 Cfdbooks.com 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 CFD Books. 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: