Tools & Wizards About Us
eurec.cz screenshot

Report Summary

  • 47

    Performance

    Renders faster than
    65% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 44% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

eurec.cz

European Research Center

Page Load Speed

3.7 sec in total

First Response

370 ms

Resources Loaded

3 sec

Page Rendered

375 ms

eurec.cz screenshot

About Website

Welcome to eurec.cz homepage info - get ready to check Eurec best content right away, or after learning these important things about eurec.cz

European Research Center | EURREC Journals | EURREC Conferences | 2021 | European Research Center s.r.o.

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Key Findings

We analyzed Eurec.cz page load time and found that the first response time was 370 ms and then it took 3.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

eurec.cz performance score

47

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.0 s

4/100

10%

LCP (Largest Contentful Paint)

Value19.9 s

0/100

25%

SI (Speed Index)

Value11.7 s

4/100

10%

TBT (Total Blocking Time)

Value50 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value13.3 s

12/100

10%

Network Requests Diagram

eurec.cz

370 ms

www.eurec-prace.cz

835 ms

eurec.css

366 ms

cz.css

250 ms

thickbox.css

236 ms

Our browser made a total of 61 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Eurec.cz, 95% (58 requests) were made to Eurec-prace.cz and 3% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (835 ms) relates to the external source Eurec-prace.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 211.7 kB (40%)

Content Size

526.0 kB

After Optimization

314.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Eurec.cz main page is 526.0 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. 30% of websites need less resources to load. Images take 267.8 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 42.7 kB

  • Original 54.4 kB
  • After minification 54.3 kB
  • After compression 11.7 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 42.7 kB or 78% of the original size.

Image Optimization

-11%

Potential reduce by 29.2 kB

  • Original 267.8 kB
  • After minification 238.6 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, Eurec needs image optimization as it can save up to 29.2 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-60%

Potential reduce by 73.0 kB

  • Original 122.4 kB
  • After minification 118.2 kB
  • After compression 49.4 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 73.0 kB or 60% of the original size.

CSS Optimization

-82%

Potential reduce by 66.7 kB

  • Original 81.3 kB
  • After minification 62.2 kB
  • After compression 14.6 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. Eurec.cz needs all CSS files to be minified and compressed as it can save up to 66.7 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (34%)

Requests Now

59

After Optimization

39

  • Images
  • JavaScript
  • CSS

The browser has sent 59 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Eurec. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

eurec.cz

eurec.cz

370 ms

www.eurec-prace.cz

www.eurec-prace.cz

835 ms

eurec.css

eurec.css

366 ms

cz.css

cz.css

250 ms

thickbox.css

thickbox.css

236 ms

autocomplete.css

autocomplete.css

246 ms

eurec.js

eurec.js

493 ms

project.js

project.js

249 ms

jquery.tooltip.js

jquery.tooltip.js

354 ms

bg-page.png

bg-page.png

213 ms

topline.jpg

topline.jpg

206 ms

bg-top-cz.png

bg-top-cz.png

226 ms

logo-cz.gif

logo-cz.gif

254 ms

logo-e.png

logo-e.png

203 ms

bg_menu.jpg

bg_menu.jpg

204 ms

bg_menu_active.jpg

bg_menu_active.jpg

225 ms

bg_content_top.jpg

bg_content_top.jpg

233 ms

lupa.png

lupa.png

260 ms

cr.png

cr.png

258 ms

bg_input_key.png

bg_input_key.png

278 ms

search-btn0.png

search-btn0.png

292 ms

9.png

9.png

303 ms

10.png

10.png

315 ms

13.png

13.png

322 ms

8.png

8.png

318 ms

1.png

1.png

390 ms

7.png

7.png

411 ms

11.png

11.png

424 ms

3.png

3.png

444 ms

6.png

6.png

435 ms

12.png

12.png

443 ms

2.png

2.png

501 ms

4.png

4.png

528 ms

5.png

5.png

542 ms

14.png

14.png

556 ms

bg_left.jpg

bg_left.jpg

561 ms

bg_section_search.gif

bg_section_search.gif

562 ms

bg_section_grey.gif

bg_section_grey.gif

611 ms

bg_content.jpg

bg_content.jpg

647 ms

arrow-down-orange.gif

arrow-down-orange.gif

659 ms

bg-dots.gif

bg-dots.gif

669 ms

go_nab.gif

go_nab.gif

684 ms

ga.js

ga.js

10 ms

__utm.gif

__utm.gif

31 ms

loadingAnimation.gif

loadingAnimation.gif

564 ms

cr1.png

cr1.png

607 ms

cr2.png

cr2.png

766 ms

cr3.png

cr3.png

757 ms

cr4.png

cr4.png

643 ms

cr5.png

cr5.png

655 ms

cr6.png

cr6.png

778 ms

cr7.png

cr7.png

681 ms

cr8.png

cr8.png

740 ms

cr9.png

cr9.png

745 ms

cr10.png

cr10.png

768 ms

cr11.png

cr11.png

803 ms

cr12.png

cr12.png

811 ms

cr13.png

cr13.png

756 ms

cr14.png

cr14.png

758 ms

print.css

print.css

122 ms

vaadmin.css

vaadmin.css

123 ms

Accessibility Review

eurec.cz accessibility score

77

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

eurec.cz 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

High

Page has valid source maps

SEO Factors

eurec.cz SEO score

82

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

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Eurec.cz 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 Czech language. Our system also found out that Eurec.cz 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

eurec.cz

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