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vt-2004.org screenshot

Report Summary

  • 69

    Performance

    Renders faster than
    80% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 30% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 62

    SEO

    Google-friendlier than
    23% of websites

vt-2004.org

ESO

Page Load Speed

5.5 sec in total

First Response

298 ms

Resources Loaded

4.8 sec

Page Rendered

383 ms

vt-2004.org screenshot

About Website

Visit vt-2004.org now to see the best up-to-date Vt 2004 content and also check out these interesting facts you probably never knew about vt-2004.org

ESO is the European Organisation for Astronomical Research in the Southern Hemisphere. It operates the La Silla Paranal Observatory in Chile and has its headquarters in Garching, near Munich, Germany.

Visit vt-2004.org

Key Findings

We analyzed Vt-2004.org page load time and found that the first response time was 298 ms and then it took 5.2 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

vt-2004.org performance score

69

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

22/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

44/100

25%

SI (Speed Index)

Value4.9 s

66/100

10%

TBT (Total Blocking Time)

Value50 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.07

96/100

15%

TTI (Time to Interactive)

Value7.4 s

48/100

10%

Network Requests Diagram

vt-2004.org

298 ms

907 ms

functions.js

179 ms

layout_eso_2007.css

308 ms

base.css

130 ms

Our browser made a total of 49 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Vt-2004.org, 94% (46 requests) were made to Eso.org and 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.9 sec) relates to the external source Eso.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 161.1 kB (27%)

Content Size

606.2 kB

After Optimization

445.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vt-2004.org main page is 606.2 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. 25% of websites need less resources to load. Images take 446.2 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 22.3 kB

  • Original 30.7 kB
  • After minification 29.1 kB
  • After compression 8.4 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 22.3 kB or 73% of the original size.

Image Optimization

-10%

Potential reduce by 42.7 kB

  • Original 446.2 kB
  • After minification 403.5 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. Vt 2004 images are well optimized though.

JavaScript Optimization

-61%

Potential reduce by 33.1 kB

  • Original 54.3 kB
  • After minification 53.7 kB
  • After compression 21.2 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 33.1 kB or 61% of the original size.

CSS Optimization

-84%

Potential reduce by 63.0 kB

  • Original 75.0 kB
  • After minification 47.8 kB
  • After compression 12.0 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. Vt-2004.org needs all CSS files to be minified and compressed as it can save up to 63.0 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 30 (64%)

Requests Now

47

After Optimization

17

  • Images
  • JavaScript
  • CSS

The browser has sent 47 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vt 2004. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

vt-2004.org

vt-2004.org

298 ms

907 ms

functions.js

functions.js

179 ms

layout_eso_2007.css

layout_eso_2007.css

308 ms

base.css

base.css

130 ms

basemod_2col_left.css

basemod_2col_left.css

182 ms

eso2008.css

eso2008.css

358 ms

nav_vlist.css

nav_vlist.css

312 ms

nav_shinybuttons.css

nav_shinybuttons.css

496 ms

header.css

header.css

764 ms

navmain.css

navmain.css

1376 ms

footer.css

footer.css

1436 ms

frontpage.css

frontpage.css

454 ms

print_003.css

print_003.css

492 ms

bg_left.gif

bg_left.gif

129 ms

headerimage.jpg

headerimage.jpg

136 ms

esologo.png

esologo.png

135 ms

austria.gif

austria.gif

133 ms

sep1.gif

sep1.gif

131 ms

belgium.gif

belgium.gif

132 ms

czechrepublic.gif

czechrepublic.gif

259 ms

denmark.gif

denmark.gif

259 ms

finland.gif

finland.gif

264 ms

france.gif

france.gif

256 ms

germany.gif

germany.gif

255 ms

italy.gif

italy.gif

260 ms

netherlands.gif

netherlands.gif

381 ms

poland.gif

poland.gif

382 ms

portugal.gif

portugal.gif

380 ms

spain.gif

spain.gif

382 ms

sweden.gif

sweden.gif

381 ms

switzerland.gif

switzerland.gif

408 ms

unitedkingdom.gif

unitedkingdom.gif

509 ms

sep2.gif

sep2.gif

506 ms

brazil.gif

brazil.gif

506 ms

chile.gif

chile.gif

507 ms

vt-button.jpg

vt-button.jpg

646 ms

ScienceWeeks.jpg

ScienceWeeks.jpg

738 ms

vt-org-logo.gif

vt-org-logo.gif

719 ms

cd-attention.jpg

cd-attention.jpg

748 ms

vt-2012-visibility-icon.gif

vt-2012-visibility-icon.gif

688 ms

ext_link2.gif

ext_link2.gif

630 ms

vt2004-if11-fig4.jpg

vt2004-if11-fig4.jpg

1376 ms

vt2004-if14-fig5.jpg

vt2004-if14-fig5.jpg

786 ms

vt2004-if1-fig4.jpg

vt2004-if1-fig4.jpg

824 ms

mt-2003-projection-normal.jpg

mt-2003-projection-normal.jpg

1855 ms

vt2004-if12-fig2.gif

vt2004-if12-fig2.gif

1069 ms

analytics.js

analytics.js

26 ms

collect

collect

13 ms

Accessibility Review

vt-2004.org accessibility score

65

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

vt-2004.org best practices score

67

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

SEO Factors

vt-2004.org SEO score

62

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

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    DE

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Vt-2004.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed German language. Our system also found out that Vt-2004.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

vt-2004.org

Open Graph description is not detected on the main page of Vt 2004. 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: