Tools & Wizards About Us
world-sustainable-energy.com screenshot

Report Summary

  • 38

    Performance

    Renders faster than
    57% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 51% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

world-sustainable-energy.com

Home | Reviesta - World Sustainable Energy Institute

Page Load Speed

20.6 sec in total

First Response

613 ms

Resources Loaded

19.5 sec

Page Rendered

548 ms

world-sustainable-energy.com screenshot

About Website

Visit world-sustainable-energy.com now to see the best up-to-date World Sustainable Energy content and also check out these interesting facts you probably never knew about world-sustainable-energy.com

World Sustainable Energy Institute is a think tank organisation based in Vienna, Austria, that is working towards sustainable solutions for cities in the areas of renewable energy and environmental te...

Visit world-sustainable-energy.com

Key Findings

We analyzed World-sustainable-energy.com page load time and found that the first response time was 613 ms and then it took 20 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster.

Performance Metrics

world-sustainable-energy.com performance score

38

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.8 s

11/100

10%

LCP (Largest Contentful Paint)

Value5.4 s

20/100

25%

SI (Speed Index)

Value10.3 s

8/100

10%

TBT (Total Blocking Time)

Value470 ms

60/100

30%

CLS (Cumulative Layout Shift)

Value0.138

79/100

15%

TTI (Time to Interactive)

Value12.4 s

15/100

10%

Network Requests Diagram

world-sustainable-energy.com

613 ms

www.world-sustainable-energy.com

1826 ms

wp-emoji-release.min.js

558 ms

style.min.css

653 ms

front_end_style.css

737 ms

Our browser made a total of 53 requests to load all elements on the main page. We found that 81% of them (43 requests) were addressed to the original World-sustainable-energy.com, 6% (3 requests) were made to Fonts.googleapis.com and 4% (2 requests) were made to Player.vimeo.com. The less responsive or slowest element that took the longest time to load (10 sec) belongs to the original domain World-sustainable-energy.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 93.8 kB (5%)

Content Size

1.7 MB

After Optimization

1.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of World-sustainable-energy.com main page is 1.7 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 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 60.1 kB

  • Original 71.4 kB
  • After minification 70.2 kB
  • After compression 11.4 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 60.1 kB or 84% of the original size.

Image Optimization

-1%

Potential reduce by 15.9 kB

  • Original 1.2 MB
  • After minification 1.2 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. World Sustainable Energy images are well optimized though.

JavaScript Optimization

-4%

Potential reduce by 12.4 kB

  • Original 304.0 kB
  • After minification 303.9 kB
  • After compression 291.6 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

-3%

Potential reduce by 5.4 kB

  • Original 165.3 kB
  • After minification 165.3 kB
  • After compression 159.9 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. World-sustainable-energy.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 33 (70%)

Requests Now

47

After Optimization

14

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 47 CSS, Javascripts, AJAX and image requests in order to completely render the main page of World Sustainable Energy. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and from 17 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

world-sustainable-energy.com

world-sustainable-energy.com

613 ms

www.world-sustainable-energy.com

www.world-sustainable-energy.com

1826 ms

wp-emoji-release.min.js

wp-emoji-release.min.js

558 ms

style.min.css

style.min.css

653 ms

front_end_style.css

front_end_style.css

737 ms

dashicons.min.css

dashicons.min.css

1070 ms

desktop_style.css

desktop_style.css

791 ms

styles.css

styles.css

1337 ms

style.css

style.css

1487 ms

page-list.css

page-list.css

1530 ms

css

css

36 ms

style.css

style.css

3026 ms

css

css

37 ms

js_composer.min.css

js_composer.min.css

4016 ms

www.world-sustainable-energy.com

www.world-sustainable-energy.com

1958 ms

prettyPhoto.min.css

prettyPhoto.min.css

2133 ms

colorbox.css

colorbox.css

3815 ms

font.css

font.css

2991 ms

slimbox2.css

slimbox2.css

3483 ms

jquery.js

jquery.js

4684 ms

jquery-migrate.min.js

jquery-migrate.min.js

5148 ms

script.js

script.js

4257 ms

wpgmza_data.js

wpgmza_data.js

4538 ms

gallery.js

gallery.js

4788 ms

colorbox.js

colorbox.js

6105 ms

slimbox2.js

slimbox2.js

5380 ms

slimbox2_autoload.js

slimbox2_autoload.js

5065 ms

api.js

api.js

37 ms

css

css

33 ms

scripts.js

scripts.js

5340 ms

plugins.js

plugins.js

5632 ms

script.js

script.js

5876 ms

new-tab.js

new-tab.js

5939 ms

effect.min.js

effect.min.js

6161 ms

wp-embed.min.js

wp-embed.min.js

6161 ms

js_composer_front.min.js

js_composer_front.min.js

6224 ms

recaptcha__en.js

recaptcha__en.js

59 ms

153912361

153912361

149 ms

Logo_Reviesta_WSEIN.png

Logo_Reviesta_WSEIN.png

1045 ms

home-00.jpg

home-00.jpg

10046 ms

wsein_icon.png

wsein_icon.png

741 ms

wsef_icon.png

wsef_icon.png

785 ms

wsec_icon.png

wsec_icon.png

796 ms

wsee_icon.png

wsee_icon.png

848 ms

vienna-03.jpg

vienna-03.jpg

4403 ms

pure_simple-1.jpg

pure_simple-1.jpg

4158 ms

home-base-1.jpg

home-base-1.jpg

5428 ms

font

font

147 ms

font

font

159 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

4755 ms

overlay.png

overlay.png

3121 ms

153912361

153912361

158 ms

555166495-3152a58d933ad798129d5178a589ba67bddfcfcb6a5a875e1ddd878e1ccf8477-d

555166495-3152a58d933ad798129d5178a589ba67bddfcfcb6a5a875e1ddd878e1ccf8477-d

451 ms

Accessibility Review

world-sustainable-energy.com accessibility score

81

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.

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

High

Links do not have a discernible name

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

world-sustainable-energy.com best practices score

83

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

SEO Factors

world-sustainable-energy.com SEO score

100

Search Engine Optimization Advices

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 World-sustainable-energy.com 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 World-sustainable-energy.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

world-sustainable-energy.com

Open Graph data is detected on the main page of World Sustainable Energy. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: